SMS Delivery Delays from a Subset of Twilio Long Codes and Toll-Free Numbers to AT&T United States

Incident Report for Twilio

Resolved

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

Posted May 11, 2026 - 18:04 PDT

Monitoring

We have observed a recovery in SMS delivery from a subset of Twilio Long Codes and Toll-Free Numbers 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 May 11, 2026 - 15:53 PDT

Update

Twilio customers may be experiencing SMS delivery report delays from a subset of Twilio Long Codes and Toll-Free Numbers 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 4 hours or as soon as more information becomes available.

Posted May 11, 2026 - 12:23 PDT

Update

Twilio customers may be experiencing SMS delivery report delays from a subset of Twilio Long Codes and Toll-Free Numbers 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 2 hours or as soon as more information becomes available.

Posted May 11, 2026 - 10:22 PDT

Identified

Twilio customers may be experiencing SMS delivery report delays from a subset of Twilio Long Codes and Toll-Free Numbers 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 May 11, 2026 - 09:21 PDT

Update

Twilio customers may be experiencing SMS delivery report delays from Twilio Long Codes to AT&T network subscribers in the United States. Our team is actively investigating this issue. We will provide another update in 4 hours or as soon as more information becomes available.

Posted May 11, 2026 - 09:16 PDT

Update

We are continuing to investigate this issue.

Posted May 11, 2026 - 08:22 PDT

Update

Twilio customers may be experiencing SMS delivery delays from Twilio Long Codes to AT&T network subscribers in the United States. Our team is actively investigating this issue. We will provide another update in 2 hours or as soon as more information becomes available.

Posted May 11, 2026 - 07:14 PDT

Investigating

Twilio customers may be experiencing SMS delivery delays from Twilio Long 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 May 11, 2026 - 06:05 PDT

This incident affected: CARRIER NETWORK (SMS Long Code, North America, SMS Toll-Free, North America) and ZIPWHIP MESSAGING (SMS Long Code, North America, SMS Toll-Free, North America).