Outage in Duo Security
[US Deployments]: Duo Phone Call Authentication Failures for US Region
Resolved MinorIncident Report
Summary AI Generated
Duo Security experienced phone call authentication failures in the US region for 4.3 hours, causing an abnormally low success rate for users attempting to authenticate via phone calls. The issue was traced to a third-party carrier problem and was resolved once the carrier fixed their systems.
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.
Components affected
Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call Delivery Duo Security Phone Call DeliveryNeed to monitor Duo Security outages?
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Latest Updates ( sorted recent to last )
RESOLVED
2 days ago - at 02/23/2026 06:20PM
The issue causing an abnormal phone call authentication success rate has been resolved by the third-party carrier.
MONITORING
2 days ago - at 02/23/2026 05:26PM
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.
INVESTIGATING
2 days ago - at 02/23/2026 02:02PM
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.
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