Trust

Maintenance Window:

Start time is October 7, 3:00 pm PDT (October 7, 22:00 UTC)

End time is October 7, 8:00 pm PDT (October 8, 3:00 UTC)

Update - Thu, 08 Oct 2026 03:43:05 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Atlanta III (ATL3) Datacenter Network Maintenance - zscaler.net

Mon, 05 Oct 2026 09:08:09 GMT

Zscaler will be performing hardware maintenance in Atlanta III (ATL3) Datacenter.

Scheduled Maintenance window,
Start: 2026-10-08 00:00 UTC
End: 2026-10-08 07:00 UTC
(Local Time 2026-10-07 20:00 - 2026-10-08 03:00)

Updated: The maintenance window has been extended by 4 hours

Update - Thu, 08 Oct 2026 06:24:18 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion Tokyo IV (TYO4) - private.zscaler.com

Mon, 05 Oct 2026 07:13:22 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in APAC, Tokyo IV (TYO4).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below
https://config.zscaler.com/private.zscaler.com/zpa

Datacenter Expansion Dubai I (DXB1) - private.zscaler.com

Mon, 05 Oct 2026 07:06:51 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in EMEA, Dubai I (DXB1).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below
https://config.zscaler.com/private.zscaler.com/zpa

ZPA Service Maintenance - zpatwo.net

Sat, 03 Oct 2026 05:23:44 GMT

Zscaler will perform routine maintenance on ZPA services to improve availability and resiliency.

During the maintenance window, Some users may experience the following impacts during the scheduled regional maintenance windows between October 7 and October 8:

- Brief delays in Admin Portal data updates, including dashboards and diagnostic information.
- Temporary delays while completing certain administrative operations or configuration changes.
- Brief latency during enrollment, clientless access, or administrative/API requests. Retrying the request should resolve any transient issue.

Important Note:
This maintenance will not affect live application traffic or existing ZPA access sessions. The ZPA Admin Portal will remain accessible throughout the maintenance window. Some information or administrative operations may be briefly delayed while the maintenance is in progress.

Update - Thu, 08 Oct 2026 10:59:48 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZPA Service Maintenance - private.zscaler.com

Sat, 03 Oct 2026 05:13:00 GMT

Zscaler will perform routine maintenance on ZPA global and regional services to improve availability and resiliency.

During the maintenance window, Some users may witness the following impact during the scheduled regional maintenance windows between 6th Oct and 11th Oct:

- Brief delays in Admin Portal data updates, including dashboards and diagnostic information.
- Temporary delays in user synchronization, SCIM provisioning, or certain administrative operations and configuration changes
- Brief latency during enrollment, clientless access, or administrative/API requests. Retrying the request should resolve any transient issue.

Important Note:
This maintenance will not affect live application traffic or existing ZPA access sessions. The ZPA Admin Portal will remain accessible throughout the maintenance window. Some information, synchronization jobs, or administrative operations may be briefly delayed while the maintenance is in progress.

ZPA Service Maintenance - zpabeta.net

Sat, 03 Oct 2026 05:01:25 GMT

Zscaler will perform routine maintenance on ZPA services to improve availability and resiliency.

During the maintenance window, some users may experience:

- Brief delays in Admin Portal data updates, including dashboards and diagnostic information.
- Temporary delays while completing certain administrative operations or configuration changes.
- Brief latency during enrollment, SAML authentication, clientless access, or administrative/API requests. Retrying the request should resolve any transient issue.

Update - Tue, 06 Oct 2026 14:57:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Honolulu I Data Center online - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 02 Oct 2026 22:03:09 GMT

Dear Zscaler Customer,

You are receiving this notice in accordance with the Zscaler Service Continuity Policy.

As part of our effort to enhance our Security Cloud’s robustness and performance, Zscaler will be bringing online a new Honolulu I (HNL1) data center. This facility will be added to the public resolution service (Auto Geo Proximity) on October 5, 2026.

What if I have more questions?

Contact Zscaler Support via the “Support” link at the top-right of the Zscaler Administration U.I page.

Or contact us by phone:

USA Toll-Free: +1-844-971-0010

Global Direct: +1-408-752-5885

10/5 Update: Extending Maintenance

Update - Tue, 06 Oct 2026 00:09:44 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Los Angeles II Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Fri, 02 Oct 2026 18:03:14 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Los Angeles II (QLA2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is October 6, 6:00 pm PDT (October 7, 1:00 UTC)

End time is October 6,11:00 pm PDT (October 7, 6:00 UTC)

Update - Wed, 07 Oct 2026 05:37:57 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Upcoming New Data Center and Changes - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Fri, 02 Oct 2026 01:23:57 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on October 1, 2026, we would like to notify you of the upcoming new data center and IP allocation changes at the locations listed below. These would be effective anytime on or after November 30, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new and remove the legacy IP address ranges.

Region	Location	CIDR	Notes
APAC	Manila I	128.1.68.0/23	New RS* data center
APAC	Manila I	2602:ffe4:c4f:1000::/64	New RS* data center
EMEA	Munich I	159.254.212.0/23	CIDR removed, covered under 159.254.212.0/22
EMEA	Munich I	159.254.214.0/23	CIDR removed, covered under 159.254.212.0/22
APAC	Mumbai VI	2400:7aa0:1319::/48	CIDR removed, covered under 2400:7aa0:1300::/40
APAC	Mumbai VI	2400:7aa0:131a::/48	CIDR removed, covered under 2400:7aa0:1300::/40
APAC	Taipei	2400:7aa0:1d13::/48	CIDR removed, covered under 2400:7aa0:1d00::/40

*RS - Regional Surcharge (An additional subscription is required to use this data center.)

We recommend that you add the IP address ranges listed in the ‘Zscaler Aggregate IP Address Ranges’ section of the CENR pages (refer applicable links below) to your access lists, firewalls, and application allow lists to avoid service disruption. The IPs from these ranges can be put in use by Zscaler for Web and Internet Application communication and dynamic service resolution.

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Scheduled Maintenance of Zero Trust Browser - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Thu, 01 Oct 2026 16:26:39 GMT

The Zscaler operations team will be performing routine maintenance on the Zero Trust Browser platform.
During the scheduled maintenance window, updates to Isolation Profiles may experience brief disruptions. However, no impact is expected on active isolation sessions.
If you have any questions or require additional information, please contact Zscaler Support.

San Francisco IV (SJC4) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 01 Oct 2026 03:15:03 GMT

Zscaler will be performing hardware maintenance in San Francisco IV (SJC4) Datacenter.

Maintenance window:
Start: 2026-10-02 01:00 UTC
End: 2026-10-02 04:00 UTC
(Local Time 2026-10-01 18:00 - 2026-10-01 21:00)

Update - Fri, 02 Oct 2026 02:05:11 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

China Premium Access Beijing Datacenter (Beijing IV) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 30 Sep 2026 20:55:40 GMT

Zscaler Engineering will be implementing scheduled platform and security enhancements for all China Premium Access subscribed customers across China Premium access platform located in the Beijing IV Data Centre. During the maintenance window, customers may experience brief intermittent disconnections or temporary impact while the changes are applied.

Start Time: 2026/10/15 16:00 (UTC)

End Time: 2026/10/15 19:00 (UTC)
(Datacenter Local Time: 2026-10-16 00:00 – 2026-10-16 03:00 China Standard Time, UTC+8:00)

Reason of Maintenance: Zscaler Engineering will be applying scheduled platform and security configuration updates for China Premium Access subscribed customers.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period.

China Premium Access Shanghai Datacenter (Shanghai VI) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 30 Sep 2026 20:51:09 GMT

Zscaler Engineering will be implementing scheduled platform and security enhancements for all China Premium Access subscribed customers across China Premium access platform located in the Shanghai VI Data Centre. During the maintenance window, customers may experience brief intermittent disconnections or temporary impact while the changes are applied.

Start Time: 2026/10/22 16:00 (UTC)
End Time: 2026/10/22 19:00 (UTC)

(Datacenter Local Time 2026-10-23 00:00 - 2026-10-23 03:00 China Standard Time (UTC+8:00))

Zero Trust Branch EMEA Region Cloud Upgrade and Maintenance - ztb-euc-m1

Wed, 30 Sep 2026 07:17:35 GMT

Zscaler will be performing cloud software upgrade and maintenance activity for Zero Trust Branch (EMEA region) cloud ZTB-EUC-M1 to deliver continued improvements in performance, stability, and security.

Maintenance window: Thu, 01 Oct 2026 00:30:00 UTC
Duration: 2 hours

No service downtime is anticipated during this maintenance window, and services are expected to remain available. However, as with any maintenance activity, there remains a limited risk of intermittent impact or brief disruption.

We appreciate your understanding and cooperation.

Update - Thu, 01 Oct 2026 06:25:08 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zero Trust Branch APAC Region Cloud Upgrade and Maintenance - ztb-in-m1

Wed, 30 Sep 2026 07:04:48 GMT

Zscaler will be performing cloud software upgrade and maintenance activity for Zero Trust Branch (APAC region) cloud ZTB-IN-M1 to deliver continued improvements in performance, stability, and security.

Maintenance window: Wed, 30 Sep 2026 12:30:00 UTC
Duration: 2 hours

We appreciate your understanding and cooperation.

Update - Wed, 30 Sep 2026 16:45:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zero Trust Branch AMER Region Cloud Upgrade and Maintenance - ztb-us-m4

Tue, 29 Sep 2026 21:13:26 GMT

Zscaler will be performing cloud software upgrade and maintenance activity for Zero Trust Branch (AMER region) cloud ZTB-US-M4 to deliver continued improvements in performance, stability, and security.

Maintenance window: Wed, 30 Sep 2026 09:30:00 UTC
Duration: 2 hours

We appreciate your understanding and cooperation.

Update - Wed, 30 Sep 2026 16:44:38 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

CPT IV (CPT4) Datacenter Network Maintenance - zscalerone.net, zscalertwo.net

Tue, 29 Sep 2026 20:02:00 GMT

Zscaler will be performing hardware maintenance in the Cape Town IV (CPT4) Datacenter.

Maintenance window,
Start: 2025-10-01 18:00 SAST
End: 2025-10-01 20:00 SAST
(i.e. 2025-10-01 16:00 - 18:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Thu, 01 Oct 2026 18:01:01 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Tel Aviv II (TLV2) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Tue, 29 Sep 2026 19:58:25 GMT

Zscaler will be performing critical hardware maintenance in the Tel Aviv II (TLV2) Datacenter.

Maintenance window,
Start: 2026-10-02 23:00 IDT
End: 2026-10-03 03:01 IDT
(i.e. 2026-10-02 20:00 - 2026-10-03 00:01 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Fri, 02 Oct 2026 21:31:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reminder Notification for Upcoming Data Center Expansion - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Mon, 28 Sep 2026 21:45:18 GMT

Dear Customer,

In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on August 14, 2026, we would like to remind you of the upcoming data center expansion at the locations listed below. These would be effective anytime on or after October 13, 2026.

Region	Location	CIDR	Notes
Americas	Dallas II	137.31.160.0/23	Expansion of existing data center
Americas	Dallas II	137.31.162.0/23	Expansion of existing data center

Please update your firewall policy rules and any upstream access control lists to allow the new IP address ranges to avoid any service disruption. We recommend that you add the IP address ranges listed in the “Zscaler Aggregate IP Address Ranges’’ section of the CENR page to your access lists, firewalls, and application allowlists to avoid service disruption. The IPs from these ranges can be put in use by Zscaler for Web and Internet Application communication and dynamic service resolution.

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Toronto III (YTO3) Datacenter Network Maintenance - zscalertwo.net

Mon, 28 Sep 2026 21:10:51 GMT

Zscaler will be performing hardware maintenance in the Toronto III (YTO3) Datacenter.

Maintenance window,
Start: 2026-10-01 19:00 EDT
End: 2026-10-01 21:00 EDT
(i.e. 2026-10-01 23:00 - 2026-10-02 01:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Fri, 02 Oct 2026 00:34:05 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion Tokyo V (TYO5) - zpatwo.net

Mon, 28 Sep 2026 20:52:50 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in Tokyo V (TYO5).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

Update - Sat, 03 Oct 2026 03:55:05 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Hyderabad I Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Mon, 28 Sep 2026 19:22:31 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Hyderabad I (HYD1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is October 1, 9:00 am PDT (October 1, 16:00 UTC)

End time is October 1, 2:00 pm PDT (October 1, 21:00 UTC)

Update - Thu, 01 Oct 2026 20:33:52 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZPA Service Maintenance - private.zscaler.com

Sat, 26 Sep 2026 10:36:55 GMT

Zscaler is performing routine maintenance on ZPA services to enhance our availability and resiliency.

Some users may witness the following impact during the scheduled regional maintenance windows. between 28th Sept and 29th Sept:

- Admin UI data including audit logs and dashboards may get delayed or temporarily display stale information.
- Administrative operations— including synchronization, notifications, configuration changes and backup/restore may take longer to complete.
- SAML authentication, client-less access and administrative/API requests may experience brief latency or require a retry.

Important Note:
This maintenance will not affect live application traffic or existing ZPA access sessions. The ZPA Admin Portal will remain accessible, though information and operations listed above may get temporarily delayed or unavailable.

Update - Tue, 29 Sep 2026 12:07:05 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZPA Service Maintenance - zpabeta.net

Sat, 26 Sep 2026 10:15:17 GMT

Zscaler is performing routine maintenance on ZPA services to enhance our availability and resiliency.

Some users may witness the following impact during this maintenance window:

- Some Admin Portal data, including scim syncs and dashboards, may be delayed or temporarily display stale information.
- Certain administrative operations—including configuration changes may take longer to complete.
- SAML authentication, client-less access and administrative/API requests may experience brief latency or require a retry.

Important Note:
This maintenance will not affect live application traffic or existing ZPA access sessions. The ZPA Admin Portal will remain accessible, though information and operations listed above may get temporarily delayed or unavailable.

Update - Wed, 30 Sep 2026 07:04:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended for APAC Region - zscalertwo.net

Fri, 25 Sep 2026 19:01:46 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalertwo.net cloud by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Fri, 25 Sep 2026 20:50:41 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscalerthree.net

Fri, 25 Sep 2026 08:52:10 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalerthree.net cloud (Americas Region) by 3 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Fri, 25 Sep 2026 11:04:41 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZPA Service Maintenance - zpatwo.net

Sat, 26 Sep 2026 10:24:44 GMT

- Admin UI data including audit logs and dashboards may get delayed or temporarily display stale information.
- Administrative operations— including scim and user data synchronization, notifications, configuration changes and backup/restore may take longer to complete.
- SAML authentication, client-less access and administrative/API requests may experience brief latency or require a retry.

Important Note:
This maintenance will not affect live application traffic or existing ZPA access sessions. The ZPA Admin Portal will remain accessible, though information and operations listed above may get temporarily delayed or unavailable.

Update - Thu, 01 Oct 2026 13:44:54 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZPA Service Maintenance - zpabeta.net

Fri, 25 Sep 2026 05:50:35 GMT

Zscaler is performing routine maintenance on ZPA services to enhance our availability and resiliency.

Some users may witness the following impact during this maintenance window:

- Admin UI data including audit logs and dashboards may get delayed or temporarily display stale information.
- Administrative operations— including synchronization, notifications, configuration changes and backup/restore may take longer to complete.
- SAML authentication, client-less access and administrative/API requests may experience brief latency or require a retry.

Important Note:
This maintenance will not affect live application traffic or existing ZPA access sessions. The ZPA Admin Portal will remain accessible, though information and operations listed above may get temporarily delayed or unavailable.

Update - Fri, 25 Sep 2026 15:32:13 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chicago II (CHI2) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Fri, 25 Sep 2026 03:07:49 GMT

Zscaler will be performing hardware maintenance in Chicago II (CHI2) Datacenter Datacenter.

Scheduled Maintenance window,
Start: 2026-09-29 02:00 UTC
End: 2026-09-29 05:00 UTC
(Local Time 2026-09-28 21:00 - 2026-09-29 00:00)

Update - Tue, 29 Sep 2026 05:26:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zero Trust Branch AMER Region Cloud Upgrade and Maintenance - ztb-us-m4

Thu, 24 Sep 2026 23:20:18 GMT

Maintenance window: Fri, 25 Sep 2026 03:30:00 UTC
Duration: 1 hours

We appreciate your understanding and cooperation.

Latest Update - Fri, 25 Sep 2026 04:36:28 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Fri, 25 Sep 2026 04:30:00 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Fri, 25 Sep 2026 04:36:28 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Business Continuity - Mumbai I Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Thu, 24 Sep 2026 19:16:12 GMT

Our vendor will be performing scheduled maintenance in our Business Continuity - Mumbai I Datacenter (BCC - Mumbai I) as outlined below. We expect minimal to no service impact during the maintenance window.

Start Time: 2026-09-30 16:00:00 UTC

End Time: 2026-09-30 21:00:00 UTC

(Datacenter Local Time 2026-09-30 21:30:00 - 2026-10-01 02:30:00 IST)

Update - Wed, 30 Sep 2026 18:47:33 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - APAC Region - zscalerthree.net

Thu, 24 Sep 2026 18:45:22 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalerthree.net cloud's APAC region by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Thu, 24 Sep 2026 21:02:11 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zero Trust Branch APAC Region Cloud Upgrade and Maintenance - ztb-in-m1

Thu, 24 Sep 2026 07:24:05 GMT

Maintenance window: Thu, 24 Sep 2026 11:30:00 UTC
Duration: 2 hours

We appreciate your understanding and cooperation.

Update - Thu, 24 Sep 2026 13:23:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zero Trust Branch AMER Region Cloud Upgrade and Maintenance - ztb-us-m2, ztb-us-m3 (beta), ztb-us-m4, ztb-us-m7

Thu, 24 Sep 2026 07:10:23 GMT

Zscaler will be performing cloud software upgrade and maintenance activity for Zero Trust Branch (AMER region) cloud ZTB-US-M2, ZTB-US-M3, ZTB-US-M4, ZTB-US-M7 to deliver continued improvements in performance, stability, and security.

Maintenance window: Thu, 24 Sep 2026 08:30:00 UTC
Duration: 2 hours

We appreciate your understanding and cooperation.

Update - Thu, 24 Sep 2026 10:30:00 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chennai II (MAA2) Datacenter Network Maintenance - zscalerthree.net

Thu, 24 Sep 2026 02:46:08 GMT

Zscaler will be performing hardware maintenance in the Chennai II (MAA2) Datacenter.

Maintenance window,
Start: 2026-9-25 20:30 IST
End: 2026-9-25 23:30 IST
(i.e. 2026-9-25 15:00 - 18:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Fri, 25 Sep 2026 17:41:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zero Trust Branch EMEA Region Cloud Upgrade and Maintenance - ztb-euc-m1

Thu, 24 Sep 2026 01:59:22 GMT

Zscaler will be performing cloud maintenance activity for ZTB-EUC-M1 to deliver continued improvements in performance, stability, and security.

Duration: 2 hours

We appreciate your understanding and cooperation.

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Thu, 01 Oct 2026 06:25:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance | Experience Center - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net

Wed, 23 Sep 2026 22:26:15 GMT

Zscaler will perform scheduled maintenance to improve Experience Center service resiliency. Maintenance will proceed one region at a time, with each region scheduled for approximately one hour within the overall maintenance window.

Expected Customer Impact: Customers may experience a brief interruption to Experience Center availability lasting approximately 15 minutes within the scheduled maintenance window.

Update - Sun, 27 Sep 2026 06:19:19 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion Manchester I (MAN1) - private.zscaler.com

Wed, 23 Sep 2026 07:24:16 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in EMEA, Manchester I (MAN1).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below
https://config.zscaler.com/private.zscaler.com/zpa

Update - Fri, 02 Oct 2026 02:17:57 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zero Trust Branch EMEA Region Cloud Upgrade and Maintenance - ztb-euc-m1

Tue, 22 Sep 2026 23:19:44 GMT

Zscaler will be performing cloud maintenance activity for ZTB-EUC-M1 to deliver continued improvements in performance, stability, and security.

Maintenance window: Wed, 23 Sep 2026 04:00:00 UTC
Duration: 2 hours

We appreciate your understanding and cooperation.

Update - Wed, 23 Sep 2026 17:40:22 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZTB-US-M4 Cloud Maintenance - ztb-us-m4

Tue, 22 Sep 2026 22:39:49 GMT

Zscaler will be performing cloud maintenance activity for ZTB-US-M4 to deliver continued improvements in performance, stability, and security.

Maintenance window: Wed, 23 Sep 2026 04:00:00 UTC
Duration: 2 hours

We appreciate your understanding and cooperation.

Update - Wed, 23 Sep 2026 17:41:12 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion Shanghai II (SHA2) - private.zscaler.com

Tue, 22 Sep 2026 10:26:51 GMT

Description:

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in APAC, Shanghai II (SHA2).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below
https://config.zscaler.com/private.zscaler.com/zpa

Critical Mumbai VI (BOM6) Datacenter Network Maintenance - zscloud.net, zscalerthree.net

Mon, 21 Sep 2026 23:23:12 GMT

Zscaler will be performing critical hardware maintenance in the Mumbai VI (BOM6) Datacenter.

Maintenance window,
Start: 2026-09-23 20:30 IST
End: 2026-09-23 23:30 IST
(i.e. 2026-09-23 15:00 - 18:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Wed, 23 Sep 2026 16:48:22 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion Tokyo V (TYO5) - private.zscaler.com

Sun, 20 Sep 2026 18:12:29 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our existing data center in Tokyo V (TYO5).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

https://config.zscaler.com/private.zscaler.com/zpa

Update - Thu, 24 Sep 2026 02:42:59 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Service Update - ZIRSVR virtual role - zscaler.net, zscalerone.net

Sun, 20 Sep 2026 08:32:02 GMT

Zscaler Site Reliability Engineering team will be performing a service update of the ZIRSVR nodes in the zscalerone.net and zscaler.net clouds. The upgrade will be deployed across these nodes beginning at 02:00 AM PDT on Sunday, Sep 20, 2026 (Sunday, Sep 20, 2026 09:00 AM UTC) and continuing for up to 2 hours. All logs will be collected and available after maintenance is complete. If you need further assistance, contact Zscaler Support with reference to this activity.

Update - Sun, 20 Sep 2026 11:35:24 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Jakarta I Data Center online - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 18 Sep 2026 22:18:47 GMT

Dear Zscaler Customer,

You are receiving this notice in accordance with the Zscaler Service Continuity Policy.

As part of our effort to enhance our Security Cloud’s robustness and performance, Zscaler is bringing online our new Jakarta I (CGK1) data center. This facility will not be added to the public resolution service (Auto Geo Proximity).

What if I have more questions?

Contact Zscaler Support via the “Support” link at the top-right of the Zscaler Administration U.I page.

Or contact us by phone:

USA Toll-Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Update - Fri, 18 Sep 2026 22:14:44 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

San Francisco IV Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Fri, 18 Sep 2026 21:08:26 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our San Francisco IV (SJC4) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is September 28, 6:00 pm PDT (September 29, 1:00 UTC)

End time is September 29, 01:00 am PDT (September 29, 8:00 UTC)

Update 9/25: Rescheduled maintenance

Update - Tue, 29 Sep 2026 10:48:58 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Hyderabad I Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Fri, 18 Sep 2026 20:57:38 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Hyderabad I (HYD1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is September 24, 9:00 am PDT (September 24, 16:00 UTC)

End time is September 24, 4:45 pm PDT (September 24, 23:45 UTC)

- Update 9/24 : Extending Maintenance

Update - Fri, 25 Sep 2026 00:02:31 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Marseille I Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Fri, 18 Sep 2026 17:09:35 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Marseille I (MRS1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is October 5, 9:00 am PDT (October 5, 16:00 UTC)

End time is October 5, 2:00 pm PDT (October 5, 21:00 UTC)

Update 9/22: Postponed - TBA
Update 10/1: Rescheduled

Update - Mon, 05 Oct 2026 22:28:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Boston I Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Fri, 18 Sep 2026 16:31:59 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Boston I (BOS1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is September 22, 4:00 pm PDT (September 22, 23:00 UTC)

End time is September 22, 10:00 pm PDT (September 23, 5:00 UTC)

Update - Wed, 23 Sep 2026 05:49:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Los Angeles II Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Fri, 18 Sep 2026 16:13:48 GMT

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is September 21, 6:00 pm PDT (September 22, 1:00 UTC)

End time is September 21, 11:00 pm PDT (September 22, 6:00 UTC)

Update - Tue, 22 Sep 2026 04:47:10 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - EMEA Region - zscloud.net

Fri, 18 Sep 2026 00:51:36 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the EMEA region's data centers on zscloud.net cloud by 2 hours. During this extended maintenance window the ZIA Admin Portal, including policy management and reporting access, and new user authentication should be successful. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed.

Update - Fri, 18 Sep 2026 03:03:59 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 16 Sep 2026 09:39:23 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance during which access to the Partner Admin UI will not be available. This maintenance can take up to 30 minutes to complete. All the logs that are collected during this period will be available after the maintenance ends.

Update - Wed, 16 Sep 2026 09:52:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Upcoming New Data Center - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Tue, 15 Sep 2026 23:58:08 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on September 15, 2026, we would like to notify you of the upcoming new data center at the location listed below. This would be available anytime on or after November 14, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	Philadelphia I	137.31.198.0/23	New data center
Americas	Philadelphia I	137.31.200.0/23	New data center
Americas	Philadelphia I	137.31.202.0/23	New data center
Americas	Philadelphia I	137.31.204.0/23	New data center
Americas	Philadelphia I	137.31.206.0/23	New data center
Americas	Philadelphia I	2605:4300:3e00::/40	New data center

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Tokyo V (TYO5) Datacenter Network Maintenance - zscloud.net

Tue, 15 Sep 2026 22:35:49 GMT

Zscaler will be performing hardware maintenance in the Tokyo V (TYO5) Datacenter.

Maintenance window,
Start: 2026-09-19 02:00 JST
End: 2026-09-19 05:00 JST
(i.e. 2026-09-18 17:00 - 20:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Fri, 18 Sep 2026 19:32:00 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Atlanta II (ATL2) Datacenter Network Maintenance - zscalertwo.net

Tue, 15 Sep 2026 22:33:34 GMT

Zscaler will be performing hardware maintenance in the Atlanta II (ATL2) Datacenter.

Maintenance window,
Start: 2026-09-17 18:00 EDT
End: 2026-09-17 19:59 EDT
(i.e. 2026-09-17 22:00 - 2026-09-18 01:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

[UPDATE] Extending trust for an additional hour due to onsite resource constraint

Update - Fri, 18 Sep 2026 00:41:49 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Singapore IV Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Tue, 15 Sep 2026 19:04:42 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Singapore IV (SIN4) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is September 18, 9:00 am PDT (September 18, 16:00 UTC)

End time is September 18, 2:00 pm PDT (September 18, 21:00 UTC)

Update - Fri, 18 Sep 2026 20:48:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Frankfurt VI Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Tue, 15 Sep 2026 18:55:53 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Frankfurt VI (FRA6) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is September 17, 9:00 am PDT (September 17, 16:00 UTC)

End time is September 17, 2:00 pm PDT (September 17, 21:00 UTC)

Update - Thu, 17 Sep 2026 18:43:04 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chicago II Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Tue, 15 Sep 2026 18:46:26 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Chicago II (CHI2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is September 17, 4:00 pm PDT (September 17, 23:00 UTC)

End time is September 17, 10:00 pm PDT (September 18, 5:00 UTC)

Update - Fri, 18 Sep 2026 04:47:45 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Release Upgrade for Zscaler Data Security Posture Management (DSPM) - app.eu.zsdpc.net

Tue, 15 Sep 2026 04:05:21 GMT

Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on September 15th, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes.

Update - Tue, 15 Sep 2026 06:00:00 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zero Trust Branch EMEA Region Cloud Upgrade and Maintenance - ztb-euc-m1

Tue, 15 Sep 2026 04:07:39 GMT

Maintenance window: Tue, 15 Sep 2026 04:30:00 UTC
Duration: 2 hours

We appreciate your understanding and cooperation.

Update - Tue, 15 Sep 2026 07:20:58 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reminder Notification for Additions to HUB IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Mon, 14 Sep 2026 23:40:47 GMT

Dear Customer,

In accordance with Zscaler Service Continuity Policy and as previously announced via Trust and email notification sent on July 31, 2026, we would like to remind you of the upcoming changes to HUB IP address ranges as listed below. The services through the new IP address ranges will be available anytime on or after September 29, 2026.

CIDR	Notes
137.31.146.0/23	New addition to Required Hub IP addresses
137.31.148.0/23	New addition to Required Hub IP addresses
137.31.150.0/23	New addition to Required Hub IP addresses
137.31.152.0/23	New addition to Required Hub IP addresses
137.31.154.0/23	New addition to Required Hub IP addresses
167.103.116.0/23	New addition to Required Hub IP addresses

Please update your firewall policy rules and any upstream access control lists to allow the new IP address range to avoid any service disruption.

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Atlanta II (ATL2) Datacenter Network Maintenance - zscalertwo.net

Thu, 10 Sep 2026 22:19:26 GMT

Zscaler will be performing hardware maintenance in the Atlanta II (ATL2) Datacenter.

Maintenance window,
Start: 2026-09-14 18:00 EDT
End: 2026-09-14 19:59 EDT
(i.e. 2026-09-14 22:00 - 23:59 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Washington DC (WAS1) Datacenter Network Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 10 Sep 2026 22:17:16 GMT

Zscaler will be performing hardware maintenance in the Washington DC (WAS1) Datacenter.

Maintenance window,
Start: 2026-09-14 18:00 EDT
End: 2026-09-14 19:59 EDT
(i.e. 2026-09-14 22:00 - 23:59 UTC)

During this maintenance, traffic will failover to redundant devices in the same datacenter, and we expect no service impact.

Update - Mon, 14 Sep 2026 23:41:37 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscalerone.net

Thu, 10 Sep 2026 20:00:08 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerone.net cloud. This maintenance is scheduled for Thursday, September 10, 2026 01:15 PM PDT (Thursday, Sep 10, 08:15 PM UTC 2026), and can take up to 30 minutes to complete.

During the maintenance, the ZIA Admin Portal, and access to policy management will not be available. A brief impact to new user authentication might occur. However, all the logs that are collected during this period will be available after the maintenance ends.

For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Update - Thu, 10 Sep 2026 20:26:08 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - APAC Region - zscalertwo.net

Thu, 10 Sep 2026 18:38:58 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalertwo.net cloud's APAC region by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Thu, 10 Sep 2026 21:03:48 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscaler.net

Thu, 10 Sep 2026 00:17:13 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscaler.net cloud. This maintenance is scheduled for Wednesday, September 09, 2026 06:00 PM PDT (Thursday, September 10, 2026 01:00 AM UTC), and can take up to 30 minutes to complete.

During the maintenance, the ZIA Admin Portal, and access to policy management will not be available. A brief impact to new user authentication might occur. However, all the logs that are collected during this period will be available after the maintenance ends.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Latest Update - Thu, 10 Sep 2026 04:36:20 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Thu, 10 Sep 2026 01:22:25 UTC

The Maintenance is moved and scheduled at Wednesday, September 09, 2026 09:00 PM PDT (Thursday, September 10, 2026 04:00 AM UTC)

Update - Thu, 10 Sep 2026 04:36:20 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZTB-IN-M1 Cloud Maintenance - ztb-in-m1

Wed, 09 Sep 2026 16:09:26 GMT

Zscaler will be performing cloud maintenance activity for ZTB-IN-M1 to deliver continued improvements in performance, stability, and security.

Maintenance window: Thu, 17 Sep 2026 11:30:00 UTC
Duration: 4 hours

We appreciate your understanding and cooperation.

ZTB-US-M4 Cloud Maintenance - ztb-us-m4

Wed, 09 Sep 2026 16:05:30 GMT

Zscaler will be performing cloud maintenance activity for ZTB-US-M4 to deliver continued improvements in performance, stability, and security.

Maintenance window: Thu, 17 Sep 2026 04:30:00 UTC
Duration: 4 hours

We appreciate your understanding and cooperation.

Prod3, Prod6 and Pulsar Cloud Upgrade and Maintenance - pulsar, prod3, prod6

Wed, 09 Sep 2026 15:49:30 GMT

Zscaler will be performing cloud software upgrade and maintenance activity for PROD3, PROD6 and PULSAR to deliver continued improvements in performance, stability, and security.

Maintenance window: Fri, 11 Sep 2026 03:30:00 UTC
Duration: 4 hours

We appreciate your understanding and cooperation.

Prod4, Prod5 and Quasar Cloud Upgrade and Maintenance - quasar, prod4, prod5

Wed, 09 Sep 2026 15:38:50 GMT

Zscaler will be performing cloud software upgrade and maintenance activity for PROD4, PROD5 and QUASAR to deliver continued improvements in performance, stability, and security.

Maintenance window: Thu, 10 Sep 2026 05:30:00 UTC
Duration: 4 hours

We appreciate your understanding and cooperation.

Update - Thu, 10 Sep 2026 09:33:12 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

DEN III (DEN3) Datacenter Network Maintenance - zscalertwo.net

Wed, 09 Sep 2026 01:39:39 GMT

Zscaler will be performing hardware maintenance in the Denver III (DEN3) Datacenter.

Maintenance window,
Start: 2026-09-10 19:00 MDT
End: 2026-09-10 21:00 MDT
(i.e. 2026-09-11 01:00 - 03:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Fri, 11 Sep 2026 03:18:47 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zdxcloud.net

Sat, 05 Sep 2026 16:48:51 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zdxcloud.net cloud by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 05 Sep 2026 17:56:52 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Tokyo V (TYO5) Critical Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Sat, 05 Sep 2026 02:20:50 GMT

Zscaler will be performing hardware maintenance in the Tokyo V (TYO5) Datacenter.

Maintenance window,
Start: 2026-09-09 22:00 JST
End: 2026-09-10 02:00 JST
(i.e. 2026-09-09 13:00 - 17:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connection and connection reestablishment may be observed.

Update - Wed, 09 Sep 2026 16:32:18 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

San Francisco 4 (SJC4) Datacenter Network Maintenance - zscalerthree.net

Fri, 04 Sep 2026 15:39:01 GMT

Zscaler will be performing hardware maintenance in the San Francisco 4 (SJC4) Datacenter.

Maintenance window,
Start: 2026-09-08 18:00 PDT
End: 2026-09-08 20:00 PDT
(i.e. 2026-09-09 01:00 - 03:00 UTC)

Update - Wed, 09 Sep 2026 02:08:54 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 03 Sep 2026 18:54:42 GMT

Zscaler will be performing an urgent maintenance on websites https://sitereview.zscaler.com/ and http://filecheck.zscaler.com/ . For more information, please check our FAQ. If you need further assistance, contact Zscaler Support with reference to this incident. Status changes will be updated here when available.

Latest Update - Fri, 04 Sep 2026 10:06:51 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Fri, 04 Sep 2026 08:55:53 UTC

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance by 2 hours.

Update - Fri, 04 Sep 2026 10:06:51 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Mumbai VI (BOM6) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Thu, 03 Sep 2026 07:55:13 GMT

Zscaler will be performing hardware maintenance in the Mumbai VI (BOM6) Datacenter.

Maintenance window,
Start: 2026-09-09 22:00 IST
End: 2026-09-09 23:59 IST
(i.e. 2026-09-09 16:30 - 18:29 UTC)

Update - Wed, 09 Sep 2026 18:52:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZTB-EUC-M1 Cloud Upgrade and Maintenance - ztb-euc-m1

Thu, 03 Sep 2026 06:07:47 GMT

Zscaler will be performing cloud software upgrade and maintenance activity for ZTB-EUC-M1 to deliver continued improvements in performance, stability, and security.

Maintenance window: Wed, 09 Sep 2026 01:00:00 UTC
Duration: 5 hours 30 mins

We appreciate your understanding and cooperation.

Update - Wed, 09 Sep 2026 15:32:29 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZTB-US-M4 Cloud Upgrade and Maintenance - ztb-us-m4

Thu, 03 Sep 2026 05:56:02 GMT

Zscaler will be performing cloud software upgrade and maintenance activity for ZTB-US-M4 to deliver continued improvements in performance, stability, and security.

Maintenance window: Fri, 04 Sep 2026 05:30:00 UTC
Duration: 4 hours

We appreciate your understanding and cooperation.

Update - Wed, 09 Sep 2026 05:38:18 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Seoul I Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Thu, 03 Sep 2026 00:01:20 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Seoul I (SEL1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/zscalerthree.net/cenr

Maintenance Window:

Start time is September 4, 9:00 am PDT (September 4, 4:00 PM UTC)

End time is September 4, 3:00 pm PDT (September 4, 10:00 pm UTC)

Update 9/4: Extending Maintenance

Update - Fri, 04 Sep 2026 22:22:18 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Upcoming Data Center Expansions and Changes - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Tue, 01 Sep 2026 23:43:28 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on September 1, 2026, we would like to notify you of the upcoming data center expansion and IP allocation changes at the locations listed below. These would be effective anytime on or after October 31, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new and remove the legacy IP address ranges.

Region	Location	CIDR	Notes
Americas	Washington DC	137.31.170.0/23	Expansion of existing data center
Americas	Bogota II	205.220.68.0/24	Removed allocation from this data center

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Mumbai VI (BOM6) Datacenter Network Maintenance - zscaler.net, zscalertwo.net

Tue, 01 Sep 2026 21:00:44 GMT

Zscaler will be performing hardware maintenance in the Mumbai VI (BOM6) Datacenter.

Maintenance window,
Start: 2026-09-04 22:00:00 IST
End: 2026-09-04 23:59 IST
(i.e. 2026-09-04 016:30 - 18:29 UTC)

During this maintenance, traffic will failover to redundant devices in the same datacenter, and we expect no service impact.

[UPDATE: corrected UTC start time]

Update - Fri, 04 Sep 2026 20:59:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Zurich I (ZRH1) Datacenter Network Maintenance - zscaler.net, zscalertwo.net

Tue, 01 Sep 2026 20:58:07 GMT

Zscaler will be performing hardware maintenance in the Zurich I (ZRH1) Datacenter.

Maintenance window,
Start: 2026-09-04 11:30 CEST
End: 2026-09-05 02:30 CEST
(i.e. 2026-09-04 21:30 - 2026-09-05 00:30 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

[UPDATED START TIME DUE TO RESOURCE CONSTRAINT]

Update - Fri, 04 Sep 2026 22:41:47 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZTB-IN-M1 Cloud Upgrade and Maintenance - ztb-in-m1

Tue, 01 Sep 2026 08:59:00 GMT

Zscaler will be performing a cloud software upgrade and maintenance activity for ZTB-IN-M1 to deliver continued improvements in performance, stability, and security.

Maintenance window: Sep 2, 2026, 13:30 to 17:30 UTC
Duration: 4 hours

We appreciate your understanding and cooperation.

Update - Thu, 03 Sep 2026 17:04:10 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscaler.net

Tue, 01 Sep 2026 02:43:39 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscaler.net cloud. This maintenance is scheduled for Monday at 07:45 PM Pacific Time on August 31, 2026 (Tuesday, September 1, 2026 02:45 AM UTC), and can take up to 30 minutes to complete.

During the maintenance, the ZIA Admin Portal, and access to policy management will not be available. A brief impact to new user authentication might occur. However, all the logs that are collected during this period will be available after the maintenance ends.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Update - Tue, 01 Sep 2026 03:09:33 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chennai II (MAA2) Datacenter Network Maintenance - zscaler.net

Fri, 28 Aug 2026 23:40:24 GMT

Zscaler will be performing hardware maintenance in the Chennai II (MAA2) Datacenter.

Maintenance window,
Start: 2026-8-31 22:00 IST
End: 2026-8-31 23:59 IST
(i.e. 2026-8-31 16:30 - 18:29 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Mon, 31 Aug 2026 18:02:11 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Dallas II Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Tue, 15 Sep 2026 16:32:00 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Dallas II (DFW2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is September 16, 6:00 pm PDT (September 17, 1:00 UTC)

End time is September 16,11:00 pm PDT (September 17, 6:00 UTC)

Update - Thu, 17 Sep 2026 05:49:10 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - AMER Region - zscalerthree.net

Fri, 28 Aug 2026 08:06:56 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalerthree.net cloud (AMER Region) by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Fri, 28 Aug 2026 10:27:15 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Scheduled Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 28 Aug 2026 06:26:36 GMT

Zscaler is performing a service upgrade on Saturday at 6:00 AM PDT on August 29, 2026 (Saturday, August 29, 2026 , 01:00 PM UTC), and is expected to last up to 4 hours.

During this maintenance period, the Zscaler Client Connector Portal on zscaler.net will be in maintenance mode. As a result, access to policy management and reporting will not be available. For the the clouds zscalerone.net, zscalertwo.net, zscalerthree.net, zscloud.net and zscaler.net the existing devices that are already enrolled will not be affected, but there may be intermittent failures in registering new devices. Rest assured, all logs will be collected and made available once the maintenance mode window concludes.

Latest Update - Sat, 29 Aug 2026 17:35:26 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 29 Aug 2026 16:26:57 UTC

We will be extending the maintenance by an hour. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 29 Aug 2026 17:35:26 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Planned Maintenance Activity for ZPA Platform - zpatwo.net

Thu, 27 Aug 2026 17:17:48 GMT

We will be performing planned maintenance on our platform infrastructure in the ZPATWO cloud to enhance availability and resiliency.

Some customers may witness below impact during this maintenance window:

Momentary disconnect and auto-reconnect of zcc.
Any active session will be disconnected.

Important Note: No action is required from customers and this communication is only intended to inform in advance.

Update - Sat, 29 Aug 2026 04:48:04 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - AMER Region - zscalertwo.net

Thu, 27 Aug 2026 08:04:58 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalertwo.net cloud (AMER Region) by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Thu, 27 Aug 2026 10:22:51 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Shanghai II (SHA2) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Thu, 27 Aug 2026 00:45:03 GMT

Zscaler will be performing hardware maintenance in Shanghai II (SHA2) Datacenter.

Scheduled Maintenance window,
Start Time: 2026-08-27 16:00 UTC
End Time: 2026-08-27 22:00 UTC

(Local Time 2026-08-28 00:00 - 2026-08-28 06:00)

Update - Thu, 27 Aug 2026 22:01:34 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Shanghai II (SHA2) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Wed, 26 Aug 2026 12:51:33 GMT

Zscaler will be performing hardware maintenance in Shanghai II (SHA2) Datacenter.

Scheduled Maintenance window,
Start Time: 2026-08-26 16:00 UTC
End Time: 2026-08-26 22:00 UTC

(Local Time 2026-08-27 00:00 - 2026-08-27 06:00)

Update - Wed, 26 Aug 2026 22:32:57 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Vancouver I Datacenter Scheduled Maintenance - Service Expansion - zscaler.net, zscalertwo.net, zscloud.net

Tue, 25 Aug 2026 19:58:16 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Vancouver I (YVR1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Start time is August 26, 6:00 pm PDT (August 27, 1:00 UTC)

End time is August 26, 11:00 pm PDT (August 27, 6:00 UTC)

Update - Thu, 27 Aug 2026 18:37:45 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Frankfurt IV (FRA4) Datacenter Network Maintenance - zscloud.net

Tue, 25 Aug 2026 10:19:07 GMT

Zscaler will be performing hardware maintenance in the Frankfurt IV (FRA4) Datacenter.

Maintenance window,
Start: 2026-08-27 02:00 CEST
End: 2026-08-27 04:00 CEST
(i.e. 2026-08-27 00:00 - 02:00 UTC)

Update - Thu, 27 Aug 2026 02:56:05 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Atlanta III Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Mon, 24 Aug 2026 22:05:04 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Atlanta III (ATL3) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is August 27, 3:00 pm PDT (August 27, 22:00 UTC)

End time is August 27, 8:00 pm PDT (August 28, 3:00 UTC)

Update - Fri, 28 Aug 2026 03:40:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Tokyo IV (TYO4) Datacenter Network Maintenance - zscaler.net

Mon, 24 Aug 2026 20:57:37 GMT

Zscaler will be performing hardware maintenance in the Tokyo IV (TYO4) Datacenter.

Maintenance window,
Start: 2026-08-27 02:00 JST
End: 2026-08-27 04:00 JST
(i.e. 2026-08-26 17:00 -19:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Wed, 26 Aug 2026 18:59:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Rio de Janeiro I Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Mon, 24 Aug 2026 20:32:05 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Rio de Janeiro I (RIO1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is September 1, 2:00 pm PDT (September 1, 21:00 UTC)

End time is September 1, 11:00 pm PDT (September 2, 6:00 UTC)

Update 8/26: Maintenance Postponed
Update 8/28: Maintenance Rescheduled

Update - Wed, 02 Sep 2026 06:31:56 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Lagos II Data Center Decommissioning - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 24 Aug 2026 19:46:33 GMT

You are receiving this notice in accordance with the Zscaler Service Continuity Policy.

Please note that the Lagos II (LOS2) Data Center will be shut down any time after October 23, 2026.

LOS2 Data Center will be removed from PAC service on September 7, 2026. Those customers that are connecting to LOS2 DC via PAC will see that only the datacenter Lagos III (LOS3) is resolvable after September 7, 2026.

Customers connected to DC via GRE or IPSEC tunnel(s) will be contacted separately with migration instructions

Other Zscaler sites and Zscaler Services will continue to operate normally.

Update 9/9/26 - Removed from GW

Scheduled Maintenance Extended - zscalertwo.net

Sun, 23 Aug 2026 19:10:15 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalertwo.net cloud (Asia Pacific Region) by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Fri, 28 Aug 2026 10:29:52 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zdxcloud.net

Sat, 22 Aug 2026 16:53:14 GMT

Update - Sat, 22 Aug 2026 18:56:00 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

ZPA Logging Zone Maintenance - zpatwo.net

Sat, 22 Aug 2026 03:36:32 GMT

We will be performing routine maintenance on our logging infrastructure in the ZPATWO de1 Logging Zone to enhance availability and resiliency. Some customers may witness below impact during this maintenance window:

Admin UI dashboards and diagnostics may display incomplete data temporarily.
If alerts are configured for these components, false events may be triggered.
Nanolog enabled customer will see timeouts on the dashboards.

Important Note:This maintenance will not impact live traffic. ZCC enrollment and ZPA logins will remain unaffected, and all services will continue to operate normally

Update - Sun, 23 Aug 2026 18:08:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscaler.net

Sat, 22 Aug 2026 01:50:00 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscaler.net cloud. This maintenance is scheduled for Saturday, August 22, 2026 02:00 AM UTC, and can take up to 4 hours to complete.

During maintenance, the Admin Portal might be temporarily placed into read-only mode, making the following unavailable: configuration changes, new user provisioning, and existing user updates through SCIM, LDAP, and SAML. However, all the logs that are collected during this period will be available after the maintenance ends.

Latest Update - Sat, 22 Aug 2026 08:03:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 22 Aug 2026 06:02:33 UTC

We will be extending the maintenance by 2 more hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 22 Aug 2026 08:03:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

San Francisco IV Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalerone.net, zscloud.net

Fri, 21 Aug 2026 21:15:44 GMT

Zscaler will be enabling IPv6 at our San Francisco IV (SJC4) Data Center. During the maintenance window the services through SJC4 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is August 24, 5:00 pm PDT (August 25, 00:00 UTC)

End time is August 24, 11:00 pm PDT (August 25, 6:00 UTC)

Update - Tue, 25 Aug 2026 05:46:30 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Scheduled Maintenance - zscaler.net

Fri, 21 Aug 2026 17:04:50 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscaler.net cloud. This maintenance is scheduled for Saturday at 06:00 AM Pacific Time on August 22, 2026 (Saturday, August 22 2026 01:00 PM UTC), and can take up to 4 hours to complete.

During this maintenance period, the Zscaler Client Connector Portal might get impacted. As a result, access to policy management and reporting will not be available. Existing devices that are already enrolled will not be affected, but there may be intermittent failures in registering new devices. Rest assured, all logs will be collected and made available once the maintenance mode window concludes. Please contact Zscaler Support if you have additional questions.

Latest Update - Sat, 22 Aug 2026 18:51:41 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 22 Aug 2026 16:22:54 UTC

Update - Sat, 22 Aug 2026 18:51:41 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion San Francisco IV (SJC4) - zpatwo.net

Thu, 20 Aug 2026 10:14:46 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our existing data center in San Francisco IV (SJC4).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

Update - Thu, 20 Aug 2026 17:04:14 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscaler.net

Thu, 20 Aug 2026 05:14:45 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscaler.net cloud. This maintenance is scheduled for Wednesday at 10:30 PM Pacific Time on August 19, 2026 (Thursday, August 20, 2026 05:30 AM UTC), and can take up to 30 minutes to complete.

During the maintenance, the ZIA Admin Portal, and access to policy management will not be available. A brief impact to new user authentication might occur. However, all the logs that are collected during this period will be available after the maintenance ends.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Update - Thu, 20 Aug 2026 05:46:57 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Perth I (PER1) Datacenter Network Maintenance - zscloud.net

Wed, 19 Aug 2026 19:51:10 GMT

Zscaler will be performing hardware maintenance in the Perth I (PER1) Datacenter.

Maintenance window,
Start: 2026-08-27 18:00 AWST
End: 2026-08-27 21:00 AWST
(i.e. 2026-08-27 10:00 - 13:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Update - Thu, 27 Aug 2026 10:38:52 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion Singapore V (SIN5) - private.zscaler.com

Wed, 19 Aug 2026 17:26:26 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our existing data center in Singapore V (SIN5).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

https://config.zscaler.com/private.zscaler.com/zpa

Update - Tue, 25 Aug 2026 21:43:42 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Atlanta II (ATL2) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Wed, 19 Aug 2026 11:50:32 GMT

Zscaler will be performing hardware maintenance in the Atlanta II (ATL2) Datacenter.

Maintenance window,
Start: 2026-08-21 03:00 EDT
End: 2026-08-21 07:00 EDT
(i.e. 2026-08-21 07:00 - 11:00 UTC)

Update - Fri, 21 Aug 2026 09:51:34 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion Capetown IV (CPT4) - zpatwo.net

Wed, 19 Aug 2026 05:53:52 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in EMEA, Capetown IV (CPT4).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below
https://config.zscaler.com/zpatwo.net/zpa

Update - Wed, 26 Aug 2026 03:13:21 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

New Datacenter Expansion Milan IV (MIL4) - zpatwo.net

Wed, 19 Aug 2026 03:53:26 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in Milan IV (MIL4).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

Update - Wed, 26 Aug 2026 03:09:24 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Vancouver I Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Tue, 18 Aug 2026 21:15:36 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Vancouver I (YVR1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Start time is August 19, 6:00 pm PDT (August 20, 1:00 UTC)

End time is August 19, 11:00 pm PDT (August 20, 6:00 UTC)

Update - Thu, 20 Aug 2026 04:30:11 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

San Francisco IV Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalerone.net, zscloud.net

Tue, 18 Aug 2026 17:16:36 GMT

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is August 20, 5:00 pm PDT (August 21, 00:00 UTC)

End time is August 20, 11:00 pm PDT (August 21, 6:00 UTC)

Update - Fri, 21 Aug 2026 05:43:36 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reminder Notification for Upcoming Data Center Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Tue, 18 Aug 2026 16:49:23 GMT

Dear Customer,

In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on July 1, 2026, we would like to remind you of the upcoming data center expansions at the locations listed below. These would be effective anytime on or after August 30, 2026.

Region	Location	CIDR	Notes
APAC	Mumbai VI	137.31.136.0/23	Expansion of existing data center
APAC	Mumbai VI	137.31.138.0/23	Expansion of existing data center
APAC	Singapore IV	137.31.142.0/23	Expansion of existing data center
APAC	Singapore IV	137.31.144.0/23	Expansion of existing data center
EMEA	Munich I	159.254.212.0/23	Expansion of existing data center
EMEA	Munich I	159.254.214.0/23	Expansion of existing data center

Please update your firewall policy rules and any upstream access control lists to allow the new IP address ranges to avoid any service disruption.We recommend that you add the IP address ranges listed in the “Zscaler Aggregate IP Address Ranges’’ section of the CENR page to your access lists, firewalls, and application allowlists to avoid service disruption. The IPs from these ranges can be put in use by Zscaler for Web and Internet Application communication and dynamic service resolution.

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Reminder Notification for Additions to HUB IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Tue, 18 Aug 2026 16:43:36 GMT

Dear Customer,

In accordance with Zscaler Service Continuity Policy and as previously announced via Trust and email notification sent on July 1, 2026, we would like to remind you of the upcoming changes to HUB IP address ranges as listed below. The services through the new IP address range will be available anytime on or after August 30, 2026.

CIDR	Notes
137.31.134.0/23	New addition to Required Hub IP addresses

Please update your firewall policy rules and any upstream access control lists to allow the new IP address range to avoid any service disruption.

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Datacenter Expansion San Francisco IV (SJC4) - private.zscaler.com

Tue, 18 Aug 2026 07:35:55 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our existing data center in San Francisco IV (SJC4).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

https://config.zscaler.com/private.zscaler.com/zpa

Update - Thu, 20 Aug 2026 17:00:08 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance on Singapore IV, Singapore V datacenters - zscalertwo.net, zscalerthree.net

Tue, 18 Aug 2026 07:34:41 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on Singapore IV, Singapore V datacenters on the zscalertwo.net and zscalerthree.net clouds. This maintenance can take up to 2 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Tue, 18 Aug 2026 08:06:49 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion Hongkong III (HKG3) - zpatwo.net

Tue, 18 Aug 2026 07:28:42 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in HongKong III (HKG3).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

Washington I Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Mon, 17 Aug 2026 22:25:28 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Washington I (WAS1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is August 19, 3:00 pm PDT (August 19, 22:00 UTC)

End time is August 19, 10:00 pm PDT (August 20, 05:00 UTC)

Update 8/19: Extending Maintenance

Update - Thu, 20 Aug 2026 06:39:20 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chennai III Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Mon, 17 Aug 2026 22:17:32 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Chennai III (MAA3) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is August 19, 9:00 am PDT (August 19, 16:00 UTC)

End time is August 19, 2:00 pm PDT (August 19, 21:00 UTC)

Update - Thu, 20 Aug 2026 03:25:20 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 17 Aug 2026 06:18:48 GMT

Update - Mon, 17 Aug 2026 06:53:49 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Release Upgrade for Zscaler Data Security Posture Management (DSPM) - app.zsdpc.net

Mon, 17 Aug 2026 04:13:13 GMT

Zscaler Data Posture Control (DSPM) Operations team will be performing a planned upgrade activity on Aug 17th, 2026. These service updates are applied in regional off-peak hours and should not result in any downtime for customers. Please reach out to Customer support for more information about the changes.

Update - Mon, 17 Aug 2026 06:46:38 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscaler.net

Sun, 16 Aug 2026 09:24:25 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscaler.net cloud. This maintenance is scheduled for Sunday, August 16, 2026 10:30 AM UTC, and can take up to 4 hours to complete.

During maintenance, which includes the control plane, the Admin Portal might be temporarily placed into read-only mode, making the following unavailable: configuration changes, new user provisioning, and existing user updates through SCIM, LDAP, and SAML. A brief impact to new user authentication might occur. However, all the logs that are collected during this period will be available after the maintenance ends.

Update - Sun, 16 Aug 2026 14:22:45 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion Toronto III (YTO3) - private.zscaler.com

Sun, 16 Aug 2026 06:43:13 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our data center in Toronto III (YTO3).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

https://config.zscaler.com/private.zscaler.com/zpa

Update - Wed, 19 Aug 2026 07:33:02 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion Toronto III (YTO3) - zpatwo.net

Sun, 16 Aug 2026 06:39:48 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in Toronto III (YTO3).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

Update - Wed, 19 Aug 2026 07:33:42 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscalerthree.net

Sun, 16 Aug 2026 05:31:30 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalerthree.net cloud by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sun, 16 Aug 2026 07:07:50 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - AMER Region - zscloud.net

Sat, 15 Aug 2026 07:44:22 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance for AMER Region by 4 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Latest Update - Sat, 15 Aug 2026 14:05:48 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 15 Aug 2026 11:43:03 UTC

We will be extending the scheduled maintenance for AMER Region by 2 more hours.As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 15 Aug 2026 14:05:48 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscalertwo.net

Sat, 15 Aug 2026 05:38:08 GMT

Update - Sat, 15 Aug 2026 07:00:25 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Upcoming Data Center Expansion - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Fri, 14 Aug 2026 22:24:29 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on August 14, 2026, we would like to notify you of the upcoming data center expansion at the location listed below. This would be available anytime on or after October 13, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	Dallas II	137.31.160.0/23	Expansion of existing data center
Americas	Dallas II	137.31.162.0/23	Expansion of existing data center

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Madrid III Datacenter Scheduled Maintenance - IPv6 Enablement - zscloud.net

Fri, 14 Aug 2026 21:59:07 GMT

Zscaler will be enabling IPv6 at our Madrid III (MAD3) Data Center. During the maintenance window the services through MAD3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is August 18, 9:00 am PDT (August 18, 16:00 UTC)

End time is August 18, 3:00 pm PDT (August 18, 22:00 UTC)

Update 8/17/26: Adjusted timing

Update - Tue, 18 Aug 2026 22:16:00 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

New York IV Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Fri, 14 Aug 2026 21:48:45 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our New York IV (NYC4) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is August 18, 3:00 pm PDT (August 18, 22:00 UTC)

End time is August 18, 11:59 pm PDT (August 19, 6:59 UTC)

Update - Wed, 19 Aug 2026 07:49:52 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chicago II Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Fri, 14 Aug 2026 21:26:59 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Chicago II (CHI2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is August 17, 3:00 pm PDT (August 17, 22:00 UTC)

End time is August 17, 8:00 pm PDT (August 18, 3:00 UTC)

Update - Tue, 18 Aug 2026 02:14:19 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Perth I (PER1) Datacenter Network Maintenance - zscloud.net

Fri, 14 Aug 2026 19:44:17 GMT

Zscaler will be performing hardware maintenance in the Perth I (PER1) Datacenter.

Maintenance window,
Start: 2026-08-18 00:00 AWST
End: 2026-08-18 02:00 AWST
(i.e. 2026-08-17 16:00 - 18:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

Precautionary Trust for Zscaler India Data Center Traffic Testing - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Wed, 12 Aug 2026 21:36:15 GMT

Dear Zscaler Customer,

This is a precautionary trust for Zscaler's BOM6/BOM7/CCU1/DEL1/HYD1/MAA2/MAA3 data centers to test international carrier traffic optimization during a major subsea cable fault.

Maintenance window,
Start: 2026-08-15 00:0:00 IST
End: 2026-08-15 04:00 IST
(i.e. 2026-08-14 18:30 - 22:30 UTC)

Minimal to no service impact is expected.

Update - Fri, 14 Aug 2026 22:23:10 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Lagos II Datacenter Scheduled Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Tue, 11 Aug 2026 10:57:20 GMT

Zscaler will be performing hardware maintenance in the Lagos II (LOS2) Datacenter.

Maintenance window,
Start: 2026-08-14 22:00 GMT+1
End: 2026-08-15 06:00 GMT+1
(i.e. 2026-08-14 21:00 - 2026-08-15 05:00 UTC)

Scope of work: Partner network infrastructure replacement / reconfiguration

Update - Tue, 18 Aug 2026 08:29:51 UTC

This activity has been completed on 8/15/2026 6:00:00 AM GMT+1. Please contact Zscaler Support if you have additional questions.

Los Angeles I Datacenter Scheduled Maintenance - zscalertwo.net

Tue, 11 Aug 2026 05:24:00 GMT

Zscaler will be performing hardware maintenance in Los Angeles I (QLA1) Datacenter.

Maintenance window:
Start: 2026-08-13 02:00 UTC
End: 2026-08-13 04:00 UTC
(Local Time 2026-08-12 19:00 - 2026-08-12 21:00)

Update - Thu, 13 Aug 2026 04:23:30 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

London III (LON3) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscalerthree.net

Mon, 10 Aug 2026 22:35:38 GMT

Zscaler will be performing hardware maintenance in the London III (LON3) Datacenter.

Maintenance window,
Start: 2026-08-12 21:00 BST
End: 2026-08-12 23:00 BST
(i.e. 2026-08-12 20:00 - 22:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Wed, 12 Aug 2026 21:58:26 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

New York III Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net

Mon, 10 Aug 2026 22:11:08 GMT

Zscaler will be enabling IPv6 at our New York III (NYC3) Data Center. During the maintenance window the services through NYC3 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is August 13, 3:00 pm PDT (August 13, 22:00 UTC)

End time is August 13, 9:00 pm PDT (August 14, 4:00 UTC)

Update - Fri, 14 Aug 2026 03:55:24 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Milan IV Data Center Online - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 10 Aug 2026 20:58:24 GMT

Dear Zscaler Customer,

You are receiving this notice in accordance with the Zscaler Service Continuity Policy.

As part of our effort to enhance our Security Cloud’s robustness and performance, Zscaler will be bringing online a new Milan IV (MIL4) data center. This facility will be added to the public resolution service (Auto Geo Proximity) on August 11, 2026

What if I have more questions?

Contact Zscaler Support via the “Support” link at the top-right of the Zscaler Administration U.I page.

Or contact us by phone:

USA Toll-Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Update 8/11: Extending Maintenance

Update - Wed, 12 Aug 2026 01:11:27 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Toronto III Datacenter Scheduled Maintenance – IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 10 Aug 2026 18:46:10 GMT

Zscaler will perform scheduled maintenance at our Toronto III (YTO3) Data Center to complete preparatory work for future IPv6 enablement.

During the maintenance window, services through the YTO3 Data Center may be restarted in phases to minimize impact.

Other Zscaler sites and services will continue to operate normally.

Maintenance Window:

Start time is August 11, 3:00 pm PDT (August 11, 22:00 UTC)

End time is August 11, 8:00 pm PDT (August 12, 3:00 UTC)

Update - Wed, 12 Aug 2026 03:23:49 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscalertwo.net

Sat, 08 Aug 2026 05:38:18 GMT

Update - Sat, 08 Aug 2026 08:08:00 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Perth I (PER1) Datacenter Network Maintenance - zscloud.net

Sat, 08 Aug 2026 00:14:46 GMT

Zscaler will be performing hardware maintenance in the Perth I (PER1) Datacenter.

Maintenance window,
Start: 2026-08-12 00:00 AWST
End: 2026-08-12 02:00 AWST
(i.e. 2026-08-11 16:00 - 18:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment will be observed.

New Datacenter Expansion Milan IV (MIL4) - private.zscaler.com

Fri, 07 Aug 2026 23:14:24 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in Milan IV (MIL4).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

https://config.zscaler.com/private.zscaler.com/zpa

Update - Thu, 13 Aug 2026 03:06:20 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

New Delhi I Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Fri, 07 Aug 2026 22:26:01 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our New Delhi I (DEL1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is August 11, 11:00 am PDT (August 11, 18:00 UTC)

End time is August 11, 6:00 pm PDT (August 12, 1:00 UTC)

Update 8/11: Extending Maintenance

Update - Wed, 12 Aug 2026 01:05:36 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Tokyo V Datacenter Scheduled Maintenance - Service Expansion - zscalerthree.net

Fri, 07 Aug 2026 22:11:03 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Tokyo V (TYO5) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

https://config.zscaler.com/

Maintenance Window:

Start time is August 11, 9:00 am PDT (August 11, 16:00 UTC)

End time is August 11, 3:00 pm PDT (August 11, 22:00 UTC)

Update 8/10: Maintenance time change

Update - Tue, 11 Aug 2026 21:11:37 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

New York IV (NYC4) Datacenter Network Maintenance - zscalerthree.net

Fri, 07 Aug 2026 20:17:07 GMT

Zscaler will be performing hardware maintenance in the New York IV (NYC4) Datacenter.

Maintenance window,
Start: 2026-08-11 18:00 EST
End: 2026-08-11 19:59 EST
(i.e. 2026-08-11 20:00 - 23:59 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Wed, 12 Aug 2026 00:01:22 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Madrid III Datacenter Scheduled Maintenance – IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 07 Aug 2026 19:28:58 GMT

Zscaler will perform scheduled maintenance at our Madrid III (MAD3) Data Center to complete preparatory work for future IPv6 enablement.

During the maintenance window, services through the MAD3 Data Center may be restarted in phases to minimize impact.

Other Zscaler sites and services will continue to operate normally.

Maintenance Window:

Start time is August 10, 11:00 am PDT (August 10, 18:00 UTC)

End time is August 10, 6:00 pm PDT (August 11, 1:00 UTC)

Update 8/10: Extending Maintenance

Update - Tue, 11 Aug 2026 01:17:31 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Marseille I Datacenter Scheduled Maintenance - IPv6 Enablement - zscalertwo.net

Fri, 07 Aug 2026 18:30:46 GMT

Zscaler will be enabling IPv6 at our Marseille I (MRS1) Data Center. During the maintenance window the services through MRS1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is August 10, 10:00 am PDT (August 10, 17:00 UTC)

End time is August 10, 3:00 pm PDT (August 10, 22:00 UTC)

Update - Mon, 10 Aug 2026 22:12:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Munich I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net

Fri, 07 Aug 2026 18:22:20 GMT

Zscaler will be enabling IPv6 at our Munich I (MUC1) Data Center. During the maintenance window the services through MUC1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is August 10, 10:00 am PDT (August 10, 17:00 UTC)

End time is August 10, 5:00 pm PDT (August 11, 00:00 UTC)

Update 8/10: Maintenance Extended

Update - Tue, 11 Aug 2026 02:05:13 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Planned Maintenance Activity for ZPA Platform - zpatwo.net

Fri, 07 Aug 2026 11:50:11 GMT

Momentary disconnect and auto-reconnect of zcc.
Any active session will be disconnected.

Important Note: No action is required from customers and this communication is only intended to inform in advance.

Please reach out to support if you have any questions or require further clarification.

Update - Sat, 08 Aug 2026 06:43:39 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Thu, 06 Aug 2026 19:37:21 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance during which access to the Zscaler Management Portal for Partners and ZDX Admin Portal might not be available. This maintenance is scheduled for Thursday at 6:00 PM Pacific Time on August 6, 2026 (Friday, August 7, 2026 01:00 AM UTC), and can take up to 3 hours to complete. All logs will be collected and available after maintenance is complete. Please contact Zscaler Support if you have additional questions.

Update - Fri, 07 Aug 2026 12:13:10 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - APAC Region - zscloud.net

Thu, 06 Aug 2026 19:18:27 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscloud.net cloud's APAC region by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Fri, 07 Aug 2026 16:08:18 UTC

This activity was completed within the mentioned timeframe. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscaler.net

Thu, 06 Aug 2026 15:59:46 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscaler.net cloud. This maintenance is scheduled for Saturday at 03:00 AM Pacific Time on August 8, 2026 (Saturday, August 8, 2026 10:00 AM UTC), and can take up to 4 hours to complete.

Latest Update - Sat, 08 Aug 2026 15:03:32 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 08 Aug 2026 14:05:05 UTC

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscaler.net cloud by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 08 Aug 2026 15:03:32 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance Activity : Browser Access/ PRA - private.zscaler.com, zpatwo.net, zpabeta.net

Thu, 06 Aug 2026 13:29:20 GMT

Zscaler is performing an urgent maintenance for ZPA client-less service. Existing clientless sessions may get briefly disconnected during this maintenance activity.

Update - Thu, 06 Aug 2026 18:47:53 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscalerthree.net

Wed, 05 Aug 2026 22:28:03 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalerthree.net cloud. This maintenance is scheduled for Wednesday at 06:00 PM Pacific Time on August 5, 2026 (Thursday, August 6, 2026 01:00 AM UTC), and can take up to 4 hours to complete.

During maintenance, which includes the control plane, the Admin Portal might be temporarily placed into read-only mode, making the following unavailable: configuration changes, new user provisioning, and existing user updates through SCIM, LDAP, and SAML. A brief impact to new user authentication might occur. However, all the logs that are collected during this period will be available after the maintenance ends.

Update - Thu, 06 Aug 2026 04:16:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion Hongkong III (HKG3) - private.zscaler.com

Tue, 04 Aug 2026 18:41:46 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in HongKong III (HKG3).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

https://config.zscaler.com/private.zscaler.com/zpa

Update - Fri, 07 Aug 2026 12:55:12 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

San Francisco IV (SJC4) Datacenter Network Maintenance - zscalertwo.net

Tue, 04 Aug 2026 17:20:35 GMT

Zscaler will be performing hardware maintenance in the San Francisco IV (SJC4) Datacenter.

Maintenance window,
Start: 2026-08-05 20:00 PDT
End: 2026-08-05 23:00 PDT
(i.e. 2026-08-06 03:00 - 06:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Thu, 06 Aug 2026 03:30:13 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance - zscaler.net

Tue, 04 Aug 2026 00:19:32 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscaler.net cloud which can take up to 30 minutes to complete.

During the maintenance, the ZIA Admin Portal, and access to policy management will not be available. A brief impact to new user authentication might occur. However, all the logs that are collected during this period will be available after the maintenance ends.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Update - Tue, 04 Aug 2026 00:47:45 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Hyderabad I Datacenter Scheduled Maintenance - Service Expansion - zscaler.net

Mon, 03 Aug 2026 20:30:30 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Hyderabad I (HYD1) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is August 6, 10:00 am PDT (August 6, 17:00 UTC)

End time is August 6, 3:00 pm PDT (August 6, 22:00 UTC)

Update - Thu, 06 Aug 2026 18:31:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Mumbai VI (BOM6) Datacenter Network Maintenance - zscalerthree.net

Mon, 03 Aug 2026 20:06:14 GMT

Zscaler will be performing hardware maintenance in the Mumbai VI (BOM6) Datacenter.

Maintenance window,
Start: 2026-08-07 21:30:00 IST
End: 2026-08-08 01:30 IST
(i.e. 2026-08-07 16:00 - 20:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Fri, 07 Aug 2026 19:49:35 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chennai II (MAA2) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Mon, 03 Aug 2026 20:01:29 GMT

Zscaler will be performing hardware maintenance in the Chennai II (MAA2) Datacenter.

Maintenance window,
Start: 2026-8-06 20:30:00 IST
End: 2026-8-06 23:30 IST
(i.e. 2026-8-06 15:00 - 18:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Thu, 06 Aug 2026 18:19:24 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Manchester I (MAN1) Datacenter Network Maintenance - zscloud.net

Mon, 03 Aug 2026 19:58:53 GMT

Zscaler will be performing hardware maintenance in the Manchester I (MAN1) Datacenter.

Maintenance window,
Start: 2026-08-07 02:00 BST
End: 2026-08-07 04:00 BST
(i.e. 2026-08-07 01:00 - 03:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Fri, 07 Aug 2026 02:57:29 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Frankfurt IV (FRA4) Datacenter Network Maintenance - zscloud.net

Mon, 03 Aug 2026 19:57:00 GMT

Zscaler will be performing hardware maintenance in the Frankfurt IV (FRA4) Datacenter.

Maintenance window,
Start: 2025-08-05 02:00 CEST
End: 2025-08-05 04:00 CEST
(i.e. 2025-08-05 00:00 - 02:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Wed, 05 Aug 2026 00:04:43 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

London V Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Mon, 03 Aug 2026 18:17:50 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our London V (LON5) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit:

Maintenance Window:

Start time is August 13, 10:00 am PDT (August 13, 17:00 UTC)

End time is August 13, 5:00 pm PDT (August 14, 00:00 UTC)

Update 8/5: Rescheduled maintenance to new date
Update 8/13: Extending maintenance

Update - Thu, 13 Aug 2026 22:38:21 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscloud.net

Sun, 02 Aug 2026 06:00:24 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscloud.net cloud by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sun, 02 Aug 2026 07:51:49 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Additions to Zscaler Hub IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Sat, 01 Aug 2026 20:10:58 GMT

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on July 31, 2026, we would like to notify you of the changes to the Zscaler Hub IP Addresses as listed below. These will be effective anytime on or after September 29, 2026; 60 days or more from the date the first email notification is sent.

Please update your firewall policy rules and any upstream Access Control Lists (ACLs) to allow the new IP address ranges to avoid any service disruption.

CIDR	Notes
137.31.146.0/23	New addition to Required Hub IP addresses
137.31.148.0/23	New addition to Required Hub IP addresses
137.31.150.0/23	New addition to Required Hub IP addresses
137.31.152.0/23	New addition to Required Hub IP addresses
137.31.154.0/23	New addition to Required Hub IP addresses
167.103.116.0/23	New addition to Required Hub IP addresses

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Urgent Maintenance - zscaler.net

Sat, 01 Aug 2026 19:22:12 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on the zscaler.net cloud. This maintenance can take up to 3 hours to complete. We expect minimal to no impact to services during the maintenance window. All logs will be collected and available after maintenance is complete.

We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.

Latest Update - Mon, 03 Aug 2026 02:53:49 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 01 Aug 2026 23:17:11 UTC

Update - Mon, 03 Aug 2026 02:53:49 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscalerone.net

Sat, 01 Aug 2026 17:17:19 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalerone.net cloud by 2 hours. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 01 Aug 2026 18:14:16 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent Maintenance : Zero Trust Browser / Browser Access - private.zscaler.com, zpatwo.net, zpabeta.net

Sat, 01 Aug 2026 08:59:19 GMT

Zscaler is performing an urgent maintenance for ZPA client-less service. Existing clientless sessions may get briefly disconnected during this maintenance activity.

Update - Sat, 01 Aug 2026 09:22:19 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscaler.net

Sat, 01 Aug 2026 06:11:16 GMT

Update - Sat, 01 Aug 2026 08:06:00 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Paris II Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 31 Jul 2026 21:33:50 GMT

Zscaler will be enabling IPv6 at our Paris II (PAR2) Data Center. During the maintenance window the services through PAR2 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is August 5, 10:00 am PDT (August 5, 17:00 UTC)

End time is August 5, 5:00 pm PDT (August 6, 00:00 UTC)

Update 8/5: Extending Maintenance

Update - Thu, 06 Aug 2026 15:40:47 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Marseille I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 31 Jul 2026 21:23:20 GMT

Zscaler will be enabling IPv6 at our Marseille I (MRS1) Data Center. During the maintenance window the services through MRS1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is August 4, 10:00 am PDT (August 4, 19:00 UTC)

End time is August 4, 4:00 pm PDT (August 5, 01:00 UTC)

Update - Tue, 04 Aug 2026 23:00:55 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

China Premium Access Plus Shanghai Datacenter (Shanghai VI) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Fri, 31 Jul 2026 18:23:13 GMT

Shanghai VI DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus Services within these data centres may experience intermittent disconnections.

Start Time: 2026/8/21 16:00 (UTC)
End Time: 2026/8/21 20:00 (UTC)

(Datacenter Local Time 2026-08-22 00:00 - 2026-08-22 04:00 China Standard Time (UTC+8:00))

Reason of Maintenance: Service providers are performing upgrades to the network device to enhance service quality and performance.
Impact During Maintenance: Intermittent connectivity might be observed during the maintenance period

Update - Fri, 21 Aug 2026 20:25:22 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reminder Notification for Upcoming Data Center Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Thu, 30 Jul 2026 17:02:32 GMT

Dear Customer,

In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on June 15, 2026, we would like to remind you of the upcoming data center expansions at the locations listed below. These would be effective anytime on or after August 14, 2026.

Region	Location	CIDR	Notes
Americas	Chicago	137.31.114.0/23	Expansion of existing data center
Americas	Chicago II	137.31.116.0/23	Expansion of existing data center

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Tel Aviv II (TLV2) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Thu, 30 Jul 2026 14:35:34 GMT

Zscaler's partner will be performing hardware maintenance in the Tel Aviv II (TLV2) Datacenter.

Maintenance window,
Start: 2026-08-02 21:00 IDT
End: 2026-08-02 23:59 IDT
(i.e. 2026-08-02 18:00 - 20:59 UTC)

During this maintenance, traffic will failover to redundant devices in the same datacenter, and our partner expects no service impact.

Update - Sun, 02 Aug 2026 20:27:11 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion Kolkata I (CCU1) - private.zscaler.com

Wed, 29 Jul 2026 19:48:52 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in Kolkata I (CCU1).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

https://config.zscaler.com/private.zscaler.com/zpa

Update - Tue, 04 Aug 2026 18:43:36 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Datacenter Expansion Mumbai VI (BOM6) - zpatwo.net

Wed, 29 Jul 2026 19:44:47 GMT

As part of our regular expansion of capacity, we are adding ZPA Public Service Edge nodes to our new data center in Mumbai VI (BOM6).

If you restrict outbound firewall access, please ensure you have added the complete set of published IPs in the URL below

Update - Tue, 04 Aug 2026 18:45:53 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Milan III (MIL3) Datacenter Network Maintenance - zscaler.net

Wed, 29 Jul 2026 02:11:04 GMT

Zscaler will be performing hardware maintenance in the Milan III (MIL3) Datacenter.

Maintenance window,
Start: 2026-08-04 03:00 CEST
End: 2026-08-04 06:00 CEST
(i.e. 2026-08-04 01:00 - 2026-08-04 04:00 UTC)

Update - Tue, 04 Aug 2026 01:53:02 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance | Cellular Network Events in Experience Center - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com

Fri, 24 Jul 2026 21:20:07 GMT

Zscaler will perform maintenance on Cellular, which is part of Zscaler Admin Console. Maintenance will occur on July 25, 2026, from 4:00 AM to 7:00 AM UTC.

During this maintenance window, the service is expected to remain available. However, admins might experience delays in viewing the latest SIM information, recent SIM-related network events, and anomaly policy events associated with SIMs.

This maintenance is intended to improve platform reliability and performance.

After the maintenance is complete, the service is expected to operate normally, and no customer action is required. If you experience any issues after the maintenance window, contact Zscaler Support for assistance.

Update - Sat, 25 Jul 2026 08:01:11 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Mumbai IV Data Center Decommissioning - zscaler.net

Thu, 23 Jul 2026 20:10:18 GMT

You are receiving this notice in accordance with the Zscaler Service Continuity Policy.

Please note that the Mumbai IV (BOM4) data center will be shut down any time on or after October 21, 2026. The customers that are still connecting to BOM4 via GRE or IPSEC tunnel(s) must migrate their traffic to the new Mumbai VII (BOM7) data center. All such customers will be contacted separately with migration instructions.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Mexico City II Data Center online - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net

Tue, 21 Jul 2026 21:51:44 GMT

Dear Zscaler Customer,

You are receiving this notice in accordance with the Zscaler Service Continuity Policy.

As part of our effort to enhance our Security Cloud’s robustness and performance, Zscaler will be bringing online a new Mexico City II (MEX2) data center. This facility will be added to the public resolution service (Auto Geo Proximity) on August 3, 2026

What if I have more questions?

Contact Zscaler Support via the “Support” link at the top-right of the Zscaler Administration U.I page.

Or contact us by phone:

USA Toll-Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Update 7/22: Maintenance postponed and rescheduled to a new date

Update - Tue, 04 Aug 2026 03:36:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance | Experience Center – India Region Expansion - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zdxcloud.net, zpatwo.net, zscalerrisk.net, zslogin.net

Mon, 20 Jul 2026 12:18:20 GMT

Zscaler will perform scheduled infrastructure maintenance for Experience Center on Tuesday, July 21, 2026, from 1:00 AM to 3:00 AM UTC to support the addition of a new geographic region in India.

The maintenance is designed to be completed without service interruption, and Experience Center is expected to remain available throughout the maintenance window. Although no disruption is anticipated, administrators may experience brief, intermittent interruptions in the unlikely event of unforeseen circumstances.

No customer action is required. Following completion of the maintenance, the service is expected to continue operating normally. If you experience any issues after the maintenance window, please contact Zscaler Support.

Update - Tue, 21 Jul 2026 05:26:09 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Urgent maintenance on ZS1 VZEN nodes - zscalerone.net

Sat, 18 Jul 2026 18:57:36 GMT

Zscaler will be performing an urgent maintenance on the VZEN nodes in zscalerone.net cloud. The maintenance will happen across VZEN nodes during the window, beginning at 02:00 PM Pacific Time on Saturday, July 18, 2026 and continuing for up to 6 hours. VZEN's services may be restarted as part of this change and service for your end users might be disrupted during the window. All logs will be collected and available after maintenance is complete.

Update - Sun, 19 Jul 2026 18:22:27 UTC

This activity was completed. Please contact Zscaler Support if you have additional questions.

New York IV (NYC4) Datacenter Network Maintenance - zscalertwo.net, zscloud.net

Fri, 17 Jul 2026 23:54:43 GMT

Zscaler will be performing hardware maintenance in the New York IV (NYC4) Datacenter.

Maintenance window,
Start: 2026-07-21 18:00 EDT
End: 2026-07-21 21:00 EDT
(i.e. 2026-07-21 22:00 - 2026-07-22 01:00 UTC)

During the maintenance, traffic will failover to redundant devices in the same datacenter. However, intermittent connections and connection reestablishment may be observed.

Update - Tue, 21 Jul 2026 23:37:07 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Munich I Datacenter Scheduled Maintenance - IPv6 Enablement - zscaler.net, zscalertwo.net, zscloud.net

Fri, 17 Jul 2026 23:09:42 GMT

Zscaler will be enabling IPv6 at our Munich I (MUC1) Data Center. During the maintenance window the services through MUC1 Data Center will be restarted in phases to minimize the service impact.

Other Zscaler sites and Zscaler Services will continue to operate normally.

Maintenance Window:

Start time is August 3, 10:00 am PDT (August 3, 17:00 UTC)

End time is August 3, 5:00 pm PDT (August 4, 00:00 UTC)

Update 7/21: Maintenance postponed
Update 7/31: Maintenance rescheduled
Update 8/3: Maintenance extended

Update - Tue, 04 Aug 2026 18:34:46 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Scheduled Maintenance Extended - zscalerone.net

Fri, 17 Jul 2026 11:01:13 GMT

The Zscaler Site Reliability Engineering team will be extending the scheduled maintenance of the zscalerone.net cloud by 5 hour. As part of our standard maintenance process, all logs will be collected and available after maintenance has been completed. Please contact Zscaler Support if you have additional questions.

Update - Fri, 17 Jul 2026 16:13:51 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Reminder Notification for Upcoming New DCs and Expansions - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com, zpatwo.net

Thu, 16 Jul 2026 20:41:08 GMT

Dear Customer,

In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on June 1, 2026, we would like to remind you of the upcoming New DCs and expansions at the locations listed below. These would be available anytime on or after July 31, 2026.

Please update your firewall policy rules and any upstream access lists to allow the new IP address ranges to avoid any service disruption.

Region	Location	CIDR	Notes
Americas	Buenos Aires II	137.31.102.0/23	New RS* data center
Americas	Buenos Aires II	137.31.104.0/23	New RS* data center
Americas	Buenos Aires II	137.31.106.0/23	New RS* data center
Americas	Buenos Aires II	137.31.108.0/23	New RS* data center
Americas	Buenos Aires II	137.31.110.0/23	New RS* data center
Americas	Buenos Aires II	2605:4300:e800::/40	New RS* data center
APAC	Canberra I	175.107.180.0/23	Expansion of existing data center
APAC	Canberra I	175.107.182.0/23	Expansion of existing data center
EMEA	Dusseldorf I	137.31.94.0/23	Expansion of existing data center

We recommend that you add the IP address ranges listed in the ‘Zscaler Aggregate IP Address Ranges’ section of the CENR page to your access lists, firewalls, and application allowlists to avoid service disruption. The IPs from these ranges can be put in use by Zscaler for Web and Internet Application communication and dynamic service resolution.

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Reminder Notification for Additions to HUB IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net

Thu, 16 Jul 2026 20:35:34 GMT

Dear Customer,

In accordance with Zscaler Service Continuity Policy and as previously announced via Trust and email notification sent on June 1, 2026, we would like to remind you of the upcoming changes to HUB IP address ranges as listed below. The services through the new IP address range will be available anytime on or after July 31, 2026.

CIDR	Notes
175.107.184.0/23	New addition to Required Hub IP addresses

Please update your firewall policy rules and any upstream access control lists to allow the new IP address range to avoid any service disruption.

For more information, please visit:

If you have any questions, please contact Zscaler Support via the “Support” link on the Zscaler Administration U.I. or contact us by phone:

USA Toll Free: +1-844-971-0010

Global Direct: +1-408-752-5885

Urgent Maintenance - zscalertwo.net

Thu, 16 Jul 2026 17:56:19 GMT

The Zscaler Site Reliability Engineering team will be performing an urgent maintenance on zscalertwo.net cloud. This maintenance is scheduled for Saturday at 06:00 AM Pacific Time on July 18, 2026 (Saturday, July 18, 2026 01:00 PM UTC), and can take up to 4 hours to complete.

Latest Update - Sat, 18 Jul 2026 17:50:38 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Update - Sat, 18 Jul 2026 16:40:38 UTC

This maintenance is extended by 2 hours.Please contact Zscaler Support if you have additional questions.

Update - Sat, 18 Jul 2026 17:50:38 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Washington DC (WAS1) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscalerthree.net

Thu, 16 Jul 2026 04:16:55 GMT

Zscaler will be performing hardware maintenance in Washington DC (WAS1) Datacenter.

Scheduled Maintenance window,
Start: 2026-07-17 02:00 UTC
End: 2026-07-17 06:00 UTC
(Local Time 2026-07-16 22:00 - 2026-07-17 02:00)

Update: The maintenance window has been extended by an additional 2 hours.

Update - Fri, 17 Jul 2026 05:12:26 UTC

This activity has been completed. Please contact Zscaler Support if you have additional questions.

Chicago II Datacenter Scheduled Maintenance - Service Expansion - zscalertwo.net

Thu, 16 Jul 2026 00:36:44 GMT

Zscaler will be expanding its global data center footprint and performing maintenance at our Chicago II (CHI2) data center. We expect minimal to no impact to services during the maintenance window.

Please update your firewall policy rules and any upstream Access Control Lists to allow all IP addresses for this DC

For more information, please visit: