# Voice Call Failures from Twilio Phone Numbers to Core Communications United States - Provider: [Twilio](https://down.guide/twilio) - Level: confirmed - Impact: Degraded - lasted 6d 13h - started 2026-07-28 03:13 UTC - Voice, North America - us - id: DWN-01050b93ca - Official page: https://stspg.io/vhyw1rj1ckqc ## Updates from Twilio ### 2026-07-28 03:13 UTC: investigating 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. ### 2026-07-28 03:33 UTC: identified 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. ### 2026-07-28 04:35 UTC: identified 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. ### 2026-07-28 06:35 UTC: identified 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. ### 2026-07-28 10:37 UTC: identified 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. ### 2026-07-28 18:38 UTC: identified 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. ### 2026-07-28 19:54 UTC: identified 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. ### 2026-07-28 20:54 UTC: identified 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. ### 2026-07-28 22:55 UTC: identified 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. ### 2026-07-29 02:56 UTC: identified 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. ### 2026-07-29 11:02 UTC: identified 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. ### 2026-07-30 03:15 UTC: identified 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. ### 2026-07-30 04:21 UTC: identified 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. ### 2026-07-30 06:22 UTC: identified 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. ### 2026-07-30 10:26 UTC: identified 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. ### 2026-07-30 18:30 UTC: identified 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. ### 2026-07-31 10:31 UTC: identified 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. ### 2026-08-01 10:33 UTC: identified 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. ### 2026-08-02 10:40 UTC: identified 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. ### 2026-08-03 10:44 UTC: identified 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. ### 2026-08-03 16:36 UTC: resolved 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. --- down.guide reads providers' official status pages every minute and adds its own evidence, always labeled. Free, no account. Agents: MCP at https://down.guide/mcp, REST at https://down.guide/api/v1, feeds at https://down.guide/feed. Built by Sazabi (https://sazabi.com/?utm_source=down-guide&utm_medium=markdown).