Major incident

Duo: SMS Delivery Failures

Affected: SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery, SMS Message Delivery

Current status of Duo: Operational — live Duo status

Timeline

1. Apr 18, 2026, 04:30 UTC
   investigating
   We are currently detecting an issue with carriers in the US region for SMS delivery. We are currently working with providers to restore the service. In the meantime, please use other means of authentication such as Duo Push.
2. Apr 18, 2026, 05:39 UTC
   investigating
   We are continuing to investigate the SMS delivery issue impacting all customers in the US region. Push notifications will continue to work as expected. Further updates will be provided as more information becomes available.
3. Apr 18, 2026, 07:09 UTC
   resolved
   The SMS delivery issue impacting customers in the US region has been resolved. SMS passcode authentication is now functioning normally. We apologize for any inconvenience caused and thank you for your patience.

Updates as published by Duo (original).