Duo Security incident
[US Deployments]: Duo Phone Call Authentication Failures for US Region
Resolved after 4 hours 17 minutes, affecting Phone Call Delivery and Phone Call Delivery and 1 more, on February 23, 2026.
The issue causing an abnormal phone call authentication success rate has been resolved by the third-party carrier.
Affected components
Update timeline
- investigating Feb 23, 2026, 02:02 PM UTC
We are currently investigating an issue causing an abnormal phone call authentication success rate for the US region. Please check back here or subscribe to updates for any changes.
- monitoring Feb 23, 2026, 05:26 PM UTC
The issue causing an abnormal phone call authentication success rate is tied to a third-party carrier. We are monitoring the third-party's communications at this time and can confirm that Duo telephony services are functioning as expected at this time.
- resolved Feb 23, 2026, 06:20 PM UTC
The issue causing an abnormal phone call authentication success rate has been resolved by the third-party carrier.
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