Posted on: Thu, 06 Nov 2025 23:48:31 UTC
Resolved on: Thu, 06 Nov 2025 23:48:31 UTC
Start Time: Mon, 05 Jan 2026 00:00:00 UTCEnd Time: Mon, 05 Jan 2026 00:00:00 UTC

Additions to Zscaler Aggregate & Hub IP Address Ranges
Scheduled For: Mon, 05 Jan 2026 00:00:00 UTC to Mon, 05 Jan 2026 00:00:00 UTC
Status: Completed

Dear Zscaler Customer,

In accordance with Zscaler Service Continuity Policy and per email notification sent on November 6, 2025, we would like to notify you of the additions to the Zscaler Hub IP Addresses and Zscaler Aggregate IP Address Ranges as listed below. These would be effective anytime on or after January 05, 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 range to avoid any service disruption.

CIDRNotes
137.31.0.0/16Hub - Recommended & Zscaler Aggregate

For more information, please visit:

https://config.zscaler.com/zscaler.net/hubs

https://config.zscaler.com/zscloud.net/hubs

https://config.zscaler.com/zscalerone.net/hubs

https://config.zscaler.com/zscalertwo.net/hubs

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

https://config.zscaler.com/zdxcloud.net/hubs

To view the list of Zscaler Aggregate IP Address Ranges, visit ‘https://config.zscaler.com/<Zscaler cloud name>/cenr’ (e.g., https://config.zscaler.com/zscaler.net/cenr). To learn more, see What is my cloud name for ZIA? 

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