Zscaler Outage History
Uptime record, past incidents, and downtime history for Zscaler.
Checking current status...
90-Day Trend
Monthly Uptime
| Month | Uptime | Days Tracked | Days with Issues |
|---|---|---|---|
| February 2026 | 25% | 24 | 18 |
| January 2026 | 100% | 1 | 0 |
Uptime is calculated from daily worst-status snapshots. A day with any non-operational status counts as a day with issues.
Daily Status (Last 25 Days)
Jan 31
Today
Operational
Degraded
Partial Outage
Major Outage
Maintenance
No Data
Incident History
February 2026
Vienna I Datacenter Scheduled Maintenance - zscloud.net
Started: Feb 24, 12:28 AM
investigating
Zscaler will be performing planned maintenance at our Vienna I (VIE1) Data Center. We expect minimal to no impact to services during the maintenance window.Maintenance Window:Start time is February 26, 12:00 pm PST (February 26, 20:00 UTC)End time is February 26, 5:00 pm PST (February 27, 1:00 UTC)
Feb 24, 12:28 AM
Melbourne II Datacenter Scheduled Maintenance - zscalerthree.net
Started: Feb 23, 9:17 PM
investigating
Zscaler will be expanding its global data center footprint and performing maintenance at our Melbourne II (MEL2) 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 DCFor more information, please visit:https://config.zscaler.com/zscalerthree.net/cenrMaintenance Window:Start time is February 25, 6:00 am PST (February 25, 14:00 UTC)End time is...
Feb 23, 9:17 PM
China Premium Access Plus Datacenter (Beijing V) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
Started: Feb 23, 5:57 PM
investigating
Beijing V DC network providers have advised maintenance work as below. During the maintenance window, China Premium Access Plus Services within this data center may experience intermittent disconnections.Start Time: 2026-03-20 16:00:00 UTCEnd Time: 2026-03-20 20:00:00 UTC(Datacenter Local Time 2026-03-21 00:00 - 2026-03-21 04:00 China Standard Time (UTC+8:00))Reason of Maintenance: Provider advised maintenance.Impact During Maintenance: Intermittent connectivity might be obser...
Feb 23, 5:57 PM
Tokyo V (TYO5) Datacenter Network Maintenance - zscalerthree.net
Started: Feb 23, 9:58 AM
investigating
Zscaler will be performing hardware maintenance in Tokyo V (TYO5) Datacenter.Scheduled Maintenance window, Start: 2026-02-24 15:00 UTC End: 2026-02-24 16:00 UTC (Local Time 2026-02-25 00:00 - 2026-02-25 01:00 JST)
Feb 23, 9:58 AM
Hyderabad I Datacenter Scheduled Maintenance - zscalertwo.net
Started: Feb 21, 5:32 AM
investigating
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 DCFor more information, please visit:https://config.zscaler.com/zscalertwo.net/cenrMaintenance Window:Start time is February 24, 9:00 am PST (February 24, 17:00 UTC)End time is Fe...
Feb 21, 5:32 AM
Frankfurt VI Datacenter Maintenance - zscaler.net
Started: Feb 20, 9:36 PM
investigating
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 DCFor more information, please visit:https://config.zscaler.com/zscaler.net/cenrMaintenance Window:Start time is February 24, 9:00 am PST (February 24, 17:00 UTC)End time is Febr...
Feb 20, 9:36 PM
Beijing IV, Beijing V, Shanghai VI Datacenter Issue - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
Started: Feb 20, 1:31 PM
investigating
Zscaler has detected an issue with our Beijing IV, Beijing V, Shanghai VI 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 suppor...
Feb 20, 1:31 PM
Beijing Datacenter Issue - zscaler.net, zscloud.net, zscalerthree.net
Started: Feb 20, 1:20 PM
investigating
Zscaler has detected an issue with its Beijing 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 chan...
Feb 20, 1:20 PM
Emergency Rio de Janeiro I (RIO1) Datacenter Network Maintenance - zscaler.net
Started: Feb 19, 8:02 PM
investigating
Zscaler will be performing Emergency hardware maintenance in the Rio de Janeiro I (RIO1) Datacenter.Maintenance window,Start: 2026-19-2 19:00 GMT-3End: 2026-19-2 21:00 GMT-3(i.e. 2026-19-2 22:00 - 2026-19-2 00:00 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, 19 Feb 2026 22:46:11 UTCThis activity has been completed. Please contact Zscaler Support if yo...
Feb 19, 8:02 PM
China Premium Access Plus Datacenters (Beijing V & Shanghai VI) Network Maintenance - zscaler.net, zscalertwo.net, zscloud.net, zscalerthree.net
Started: Feb 19, 12:40 AM
investigating
Beijing V & 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: 2026-02-27 14:00:00 UTCEnd Time: 2026-02-27 17:00:00 UTC(Datacenter Local Time 2026-02-27 22:00 - 2026-02-28 01:00 China Standard Time (UTC+8:00))Reason of Maintenance: Provider advised maintenance.Impact During Maintenance: Intermittent connect...
Feb 19, 12:40 AM