Duo Phone Call Authentication Failures - United States

Update timeline

1. investigating Aug 08, 2026, 09:13 PM UTC

   We have identified an issue causing phone call authentication failures for customers in the United States. This is related to a third-party carrier disruption. We are actively monitoring the carrier issue and working with our provider as needed. Please check back here or subscribe to updates for any changes.

2. investigating Aug 08, 2026, 11:04 PM UTC

   [Comment from Opsgenie]System noted: "Statuspage incident status [IDENTIFIED] has changed as [MONITORING]. Statuspage incident message [We have identified an issue causing phone call authentication failures for customers in the United States. This is related to a third-party carrier disruption. We are actively monitoring the carrier issue and working with our provider as needed. Please check back here or subscribe to updates for any changes.] has changed as [We are seeing recovery for the issue related to a third-party carrier disruption that caused phone call authentication failures for customers in the United States. We are actively monitoring phone call authentication delivery and will provide another update once the issue is fully resolved.]. Following components are removed: [Logs]. " on alert: "Duo Phone Call Authentication Failures - United States"

3. investigating Aug 09, 2026, 12:07 AM UTC

   [Comment from Opsgenie]System noted: "Statuspage incident status [MONITORING] has changed as [RESOLVED]. Statuspage incident message [We are seeing recovery for the issue related to a third-party carrier disruption that caused phone call authentication failures for customers in the United States. We are actively monitoring phone call authentication delivery and will provide another update once the issue is fully resolved.] has changed as [Phone call authentication delivery for customers in the United States has returned to normal operation. If customers continue to experience issues, please contact Duo Support.]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. Statuspage incident component [Phone Call Delivery] status [degraded_performance] has changed as [operational]. " on alert: "Duo Phone Call Authentication Failures - United States"