Voice Call Failures from Twilio Phone Numbers to Core Communications United States

Update timeline

1. investigating Jul 28, 2026, 03:13 AM UTC

   Twilio customers may be experiencing voice call failures from subset of Twilio Phone Numbers to network subscribers in the United States, impacting a subset of phone numbers. 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 Jul 28, 2026, 03:33 AM UTC

   Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to 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.

3. identified Jul 28, 2026, 04:35 AM UTC

   Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to 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.

4. identified Jul 28, 2026, 06:35 AM UTC

   Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to 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.

5. identified Jul 28, 2026, 10:37 AM UTC

   Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to 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 8 hours or as soon as more information becomes available.

6. identified Jul 28, 2026, 06:38 PM UTC

   Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to 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 16 hours or as soon as more information becomes available.

7. identified Jul 28, 2026, 07:54 PM UTC

   Twilio customers may be experiencing voice call failures from Twilio to Core Communications 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.

8. identified Jul 28, 2026, 08:54 PM UTC

   Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Core Communications 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.

9. identified Jul 28, 2026, 10:55 PM UTC

   Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Core Communications 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.

10. identified Jul 29, 2026, 02:56 AM UTC

    Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Core Communications 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 8 hours or as soon as more information becomes available.

11. identified Jul 29, 2026, 11:02 AM UTC

    Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Core Communications 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 16 hours or as soon as more information becomes available.

12. identified Jul 30, 2026, 03:15 AM UTC

    Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Core Communications 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.

13. identified Jul 30, 2026, 04:21 AM UTC

    Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Core Communications 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.

14. identified Jul 30, 2026, 06:22 AM UTC

    Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Core Communications 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.

15. identified Jul 30, 2026, 10:26 AM UTC

    Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Core Communications 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 8 hours or as soon as more information becomes available.

16. identified Jul 30, 2026, 06:30 PM UTC

    Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Core Communications 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 16 hours or as soon as more information becomes available.

17. identified Jul 31, 2026, 10:31 AM UTC

    Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Core Communications 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 24 hours or as soon as more information becomes available.

18. identified Aug 01, 2026, 10:33 AM UTC

    Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Core Communications 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 24 hours or as soon as more information becomes available.

19. identified Aug 02, 2026, 10:40 AM UTC

    Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Core Communications 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 24 hours or as soon as more information becomes available.

20. identified Aug 03, 2026, 10:44 AM UTC

    Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Core Communications 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 24 hours or as soon as more information becomes available.

21. resolved Aug 03, 2026, 04:36 PM UTC

    We have completed our investigation and determined that this event did not result in any customer impact. Therefore, voice calls from Twilio Phone Numbers to network subscribers in the United States are operating normally.