Resolved
The issue affecting SMS delivery to US phone numbers has been resolved. Services are now fully operational.
Posted Aug 06, 2025 - 04:06 EDT
Identified
We have identified an issue causing SMS delivery delays and failures in the US. We are waiting for AT&T to fix the issues on their end.
During this time, please use alternate authentication methods such as Duo Push, Duo Mobile Passcodes, Hardware Tokens etc to login to your Duo-protected integrations.
Posted Aug 06, 2025 - 00:49 EDT
Investigating
We are investigating an issue causing SMS delivery delays and failures in the US. We are waiting for AT&T to fix the issues on their end.
During this time, please use alternate authentication methods such as Duo Push, Duo Mobile Passcodes, Hardware Tokens etc to login to your Duo-protected integrations.
Posted Aug 06, 2025 - 00:40 EDT
This incident affected: DUO1 (SMS Message Delivery), DUO2 (SMS Message Delivery), DUO3 (SMS Message Delivery), DUO4 (SMS Message Delivery), DUO5 (SMS Message Delivery), DUO6 (SMS Message Delivery), DUO7 (SMS Message Delivery), DUO10 (SMS Message Delivery), DUO13 (SMS Message Delivery), DUO14 (SMS Message Delivery), DUO15 (SMS Message Delivery), DUO16 (SMS Message Delivery), DUO17 (SMS Message Delivery), DUO18 (SMS Message Delivery), DUO19 (SMS Message Delivery), DUO20 (SMS Message Delivery), DUO21 (SMS Message Delivery), DUO22 (SMS Message Delivery), DUO23 (SMS Message Delivery), DUO24 (SMS Message Delivery), DUO25 (SMS Message Delivery), DUO26 (SMS Message Delivery), DUO27 (SMS Message Delivery), DUO28 (SMS Message Delivery), DUO31 (SMS Message Delivery), DUO32 (SMS Message Delivery), DUO33 (SMS Message Delivery), DUO34 (SMS Message Delivery), DUO36 (SMS Message Delivery), DUO37 (SMS Message Delivery), DUO39 (SMS Message Delivery), DUO40 (SMS Message Delivery), DUO41 (SMS Message Delivery), DUO42 (SMS Message Delivery), DUO43 (SMS Message Delivery), DUO44 (SMS Message Delivery), DUO45 (SMS Message Delivery), DUO46 (SMS Message Delivery), DUO9 (SMS Message Delivery), DUO49 (SMS Message Delivery), DUO50 (SMS Message Delivery), DUO51 (SMS Message Delivery), DUO52 (SMS Message Delivery), DUO53 (SMS Message Delivery), DUO55 (SMS Message Delivery), DUO56 (SMS Message Delivery), DUO58 (SMS Message Delivery), DUO59 (SMS Message Delivery), DUO60 (SMS Message Delivery), DUO62 (SMS Message Delivery), DUO63 (SMS Message Delivery), DUO64 (SMS Message Delivery), DUO65 (SMS Message Delivery), DUO72 (SMS Message Delivery), DUO73 (SMS Message Delivery), DUO74 (SMS Message Delivery), DUO75 (SMS Message Delivery), DUO76 (SMS Message Delivery), DUO77 (SMS Message Delivery), DUO78 (SMS Message Delivery), DUO79 (SMS Message Delivery), DUO80 (SMS Message Delivery), and DUO35 (SMS Message Delivery).