Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved.
Root Cause: Preliminary root cause is attributed to an internal backend infrastructure issue, which has since been fully resolved.
Following the actions previously taken by Zscaler, the incident has been resolved.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Services have recovered following remediation of a network configuration issue by our infrastructure partner. We are continuing to monitor the environment to ensure stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.
Provider resolved: . The notice publication date does not establish the outage start.
resolved
Following the actions previously taken by Zscaler, the incident has been resolved. Our systems remain fully operational, and we will continue to monitor the situation closely to ensure ongoing stability.
Tokyo IV and Tokyo V Data Center Issue - zscalerthree.net
Provider resolved: . The notice publication date does not establish the outage start.
resolved
The performance issue has been resolved. The degradation was observed between 0800–1000 Japan time following resumption of business activity post a holiday period, and recovered without any intervention. The environment is confirmed stable.
Legacy Incident Archive
453 archived records restored. These records predate source-at-observation attestation. They are shown as historical ServiceAlert records only and do not establish a provider-reported incident, resolution, duration, or current active state.
March 2026
Oslo III Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with its Oslo III datacenter and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. 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 cha...
Urgent Oslo III (OSL3) Datacenter Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net, private.zscaler.com
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be performing hardware maintenance in the Oslo III (OSL3) Datacenter.Maintenance window,Start: 2026-03-25 13:00 CESTEnd: 2026-03-25 16:00 CEST(i.e. 2026-03-25 12:00 - 2026-03-25 15:00 UTC)Update - Wed, 25 Mar 2026 13:58:57 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
Mumbai VI (BOM6) Datacenter Network Maintenance - zscaler.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be performing hardware maintenance in Mumbai VI (BOM6) Datacenter .Maintenance window: Start: 2026-03-27 12:30 UTC End: 2026-03-27 14:30 UTC (Local Time 2026-03-27 18:00 - 2026-03-27 20:00 IST)
Los Angeles I Datacenter Scheduled Maintenance - zscalertwo.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be performing hardware maintenance in Los Angeles I (QLA1) Datacenter.Maintenance window: Start: 2026-03-26 02:00 UTC End: 2026-03-26 04:00 UTC (Local Time 2026-03-25 19:00 - 2026-03-25 21:00)Update - Thu, 26 Mar 2026 03:59:14 UTCThis 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
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Dear Customer, In accordance with the Zscaler Service Continuity Policy and as previously announced via email notification and Trust on February 4, 2026, we would like to remind you of the upcoming data center expansion at the location listed below. These would be effective anytime on or after April 5, 2026.Please update your firewall policy rules and any upstream access control lists to allow the new IP address ranges to avoid any service disruption.RegionLocationCID...
Reminder Notification for Additions of HUB IP Address Ranges - zscaler.net, zscalerone.net, zscalertwo.net, zscloud.net, zscalerthree.net, zdxcloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Dear Customer, In accordance with Zscaler Service Continuity Policy and as previously announced via Trust and email notification sent on February 4, 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 April 5, 2026.CIDRNotes205.220.118.0/23New addition to Required Hub IP addresses101.2.244.0/23New addition to Required Hub I...
Abu Dhabi I and Dubai II Data Center Issue - zscloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with its Abu Dhabi I and Dubai II datacenter on the zcloud.net cloud and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler c...
Dubai I Data Center Issue - zscloud.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with its Dubai I datacenter on zscloud.net and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. 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 (CS...
Canberra I Data Center Issue - zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler has detected an issue with its Canberra I datacenter on the zscalerthree.net cloud and is currently investigating the matter. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer ...
San Francisco IV (SJC4) Datacenter Network Maintenance - zscalertwo.net, zscalerthree.net
majorSource not attested
Last archived state: investigating
View archived record details
investigating
Zscaler will be performing hardware maintenance in San Francisco IV (SJC4) Datacenter.Maintenance window: Start: 2026-03-25 03:30 UTC End: 2026-03-25 06:30 UTC (Local Time 2026-03-24 20:30 - 2026-03-24 23:30)Update - Wed, 25 Mar 2026 04:00:53 UTCThis activity has been completed. Please contact Zscaler Support if you have additional questions.
