Twilio incident

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

Twilio experienced a minor incident on September 9, 2026 affecting SMS Long Code, North America and SMS Short Code, North America, lasting 3h 51m. The incident has been resolved; the full update timeline is below.

Started: Sep 09, 2026, 06:58 PM UTC
Resolved: Sep 09, 2026, 10:50 PM UTC
Duration: 3h 51m
Detected by Pingoru: Sep 09, 2026, 06:58 PM UTC

Affected components

SMS Long Code, North AmericaSMS Short Code, North America

Update timeline

investigating Sep 09, 2026, 06:58 PM UTC

Twilio customers may be experiencing SMS delivery failures from a subset of Twilio Short Codes and 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.
identified Sep 09, 2026, 07:22 PM UTC

Twilio customers may be experiencing SMS delivery failures from a subset of Twilio Long 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.
monitoring Sep 09, 2026, 08:19 PM UTC

We have observed a recovery in SMS delivery from a subset of Twilio Long 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.
monitoring Sep 09, 2026, 10:20 PM UTC

We have observed a recovery in SMS delivery from a subset of Twilio Long Codes to AT&T network subscribers in the United States and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.
resolved Sep 09, 2026, 10:50 PM UTC

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