SMS Delivery Failures from a Subset of Twilio Short Codes to AT&T United States

Incident Report for Twilio

Resolved

The incident has been resolved and SMS delivery from a subset of Twilio Short Codes to AT&T network subscribers in the United States is operating normally.

Posted Jun 11, 2026 - 13:32 PDT

Monitoring

We have observed a recovery in SMS delivery from a subset of Twilio Short Codes to AT&T network subscribers in the United States and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

Posted Jun 11, 2026 - 11:30 PDT

Identified

Twilio customers may be experiencing SMS delivery failures from a subset of Twilio Short Codes to AT&T network subscribers in the United States. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

Posted Jun 11, 2026 - 11:01 PDT

Investigating

Twilio customers may be experiencing SMS delivery failures from a subset of Twilio Short Codes to AT&T network subscribers in the United States. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

Posted Jun 11, 2026 - 10:52 PDT

This incident affected: CARRIER NETWORK (SMS Short Code, North America).