Twilio incident

SMS Delivery Receipt Delays from a Subset of Twilio Phone Numbers to Telefonica El Salvador

Minor Resolved View vendor source →

Twilio experienced a minor incident on August 21, 2026 affecting SMS, Latin America and SMS, APAC and 1 more component, lasting 13d 14h. The incident has been resolved; the full update timeline is below.

Started
Aug 21, 2026, 09:20 PM UTC
Resolved
Sep 04, 2026, 12:06 PM UTC
Duration
13d 14h
Detected by Pingoru
Aug 21, 2026, 09:20 PM UTC

Affected components

SMS, Latin AmericaSMS, APACMMS, APACSMS, EuropeSMS, Middle East & Africa

Update timeline

  1. investigating Aug 21, 2026, 09:20 PM UTC

    Twilio customers may be experiencing MMS delivery delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

  2. identified Aug 21, 2026, 09:20 PM UTC

    Twilio customers may be experiencing MMS delivery delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. 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.

  3. identified Aug 21, 2026, 09:44 PM UTC

    Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. 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.

  4. identified Aug 21, 2026, 10:45 PM UTC

    Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. 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.

  5. identified Aug 22, 2026, 12:46 AM UTC

    Twilio customers may be experiencing MMS delivery delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. 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.

  6. identified Aug 22, 2026, 04:46 AM UTC

    Twilio customers may be experiencing MMS delivery delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

  7. identified Aug 22, 2026, 06:58 AM UTC

    Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. 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.

  8. identified Aug 22, 2026, 07:59 AM UTC

    Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. 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.

  9. identified Aug 22, 2026, 10:00 AM UTC

    Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. 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.

  10. identified Aug 22, 2026, 02:02 PM UTC

    Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

  11. identified Aug 22, 2026, 10:02 PM UTC

    Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 16 hours or as soon as more information becomes available.

  12. identified Aug 23, 2026, 02:10 PM UTC

    Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 24 hours or as soon as more information becomes available.

  13. identified Aug 24, 2026, 02:11 PM UTC

    Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 24 hours or as soon as more information becomes available.

  14. identified Aug 24, 2026, 11:18 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 1 hour or as soon as more information becomes available.

  15. identified Aug 25, 2026, 12:18 AM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 2 hours or as soon as more information becomes available.

  16. identified Aug 25, 2026, 02:18 AM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 4 hours or as soon as more information becomes available.

  17. identified Aug 25, 2026, 06:19 AM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 8 hours or as soon as more information becomes available.

  18. identified Aug 25, 2026, 02:20 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 16 hours or as soon as more information becomes available.

  19. identified Aug 26, 2026, 06:21 AM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 24 hours or as soon as more information becomes available.

  20. identified Aug 27, 2026, 06:27 AM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 24 hours or as soon as more information becomes available.

  21. identified Aug 28, 2026, 06:28 AM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 24 hours or as soon as more information becomes available.

  22. identified Aug 29, 2026, 06:28 AM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 24 hours or as soon as more information becomes available.

  23. identified Aug 30, 2026, 06:30 AM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 24 hours or as soon as more information becomes available.

  24. identified Aug 31, 2026, 06:31 AM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 24 hours or as soon as more information becomes available.

  25. identified Aug 31, 2026, 02:25 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 1 hour or as soon as more information becomes available.

  26. identified Aug 31, 2026, 03:25 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 2 hours or as soon as more information becomes available.

  27. identified Aug 31, 2026, 05:32 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 4 hours or as soon as more information becomes available.

  28. identified Aug 31, 2026, 09:35 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 8 hours or as soon as more information becomes available.

  29. identified Sep 01, 2026, 05:35 AM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 16 hours or as soon as more information becomes available.

  30. identified Sep 01, 2026, 09:35 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 24 hours or as soon as more information becomes available.

  31. identified Sep 02, 2026, 09:36 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 24 hours or as soon as more information becomes available.

  32. identified Sep 03, 2026, 09:36 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 24 hours or as soon as more information becomes available.

  33. monitoring Sep 04, 2026, 05:59 AM UTC

    We have observed a recovery in SMS delivery receipts from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

  34. monitoring Sep 04, 2026, 08:03 AM UTC

    We have observed a recovery in SMS delivery receipts from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

  35. resolved Sep 04, 2026, 12:06 PM UTC

    The incident has been resolved and SMS delivery receipts from a subset of Twilio Phone Numbers to Telefonica network subscribers in El Salvador are operating normally.