Twilio incident

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

Minor Resolved View vendor source →

Twilio experienced a minor incident on May 11, 2026 affecting SMS Long Code, North America and SMS Long Code, North America and 1 more component, lasting 11h 59m. The incident has been resolved; the full update timeline is below.

Started
May 11, 2026, 01:05 PM UTC
Resolved
May 12, 2026, 01:04 AM UTC
Duration
11h 59m
Detected by Pingoru
May 11, 2026, 01:05 PM UTC

Affected components

SMS Long Code, North AmericaSMS Long Code, North AmericaSMS Toll-Free, North AmericaSMS Toll-Free, North America

Update timeline

  1. investigating May 11, 2026, 01:05 PM UTC

    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.

  2. investigating May 11, 2026, 02:14 PM UTC

    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.

  3. investigating May 11, 2026, 03:22 PM UTC

    We are continuing to investigate this issue.

  4. investigating May 11, 2026, 04:16 PM UTC

    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.

  5. identified May 11, 2026, 04:21 PM UTC

    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.

  6. identified May 11, 2026, 05:22 PM UTC

    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.

  7. identified May 11, 2026, 07:23 PM UTC

    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.

  8. monitoring May 11, 2026, 10:53 PM UTC

    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.

  9. resolved May 12, 2026, 01:04 AM UTC

    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.