All Deployments: SMS Delivery Issues to some US Carriers
Resolved
The SMS carrier delivery failures that were identified have been resolved and we are now seeing an expected level of delivery success. All services are operational at this time.
Posted May 18, 2023 - 15:10 EDT
Monitoring
The SMS carrier delivery failures that were identified have now stabilized and we are now seeing increased success rates within the affected customer base.
We will continue to monitor the issue and will post any updates when the incident is considered fully resolved.
Please check back or subscribe here for further updates.
Posted May 18, 2023 - 14:44 EDT
Investigating
We are investigating failures with SMS delivery to some carriers in the US, most prominently AT&T. We are working with our providers on determining the source of the issue and will provide updates as soon as they are available. In the meantime, please use other authentication methods such as Passkeys, Duo Push, Duo Mobile Passcodes, and Phone Call as those methods are unaffected.
Posted May 18, 2023 - 14:06 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), DUO8 (SMS Message Delivery), DUO47 (SMS Message Delivery), DUO10 (SMS Message Delivery), DUO11 (SMS Message Delivery), DUO12 (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), DUO29 (SMS Message Delivery), DUO30 (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), DUO38 (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), DUO48 (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), DUO54 (SMS Message Delivery), DUO55 (SMS Message Delivery), DUO56 (SMS Message Delivery), DUO57 (SMS Message Delivery), DUO58 (SMS Message Delivery), DUO59 (SMS Message Delivery), DUO60 (SMS Message Delivery), DUO61 (SMS Message Delivery), DUO62 (SMS Message Delivery), DUO63 (SMS Message Delivery), DUO64 (SMS Message Delivery), DUO65 (SMS Message Delivery), DUO66 (SMS Message Delivery), DUO67 (SMS Message Delivery), DUO68 (SMS Message Delivery), DUO69 (SMS Message Delivery), DUO70 (SMS Message Delivery), DUO71 (SMS Message Delivery), DUO72 (SMS Message Delivery), DUO73 (SMS Message Delivery), and DUO35 (SMS Message Delivery).