Twilio incident
Voice Call Failures from T-Mobile United States to a Subset of Twilio United States Phone Numbers
Resolved after 1 hour 38 minutes, affecting Voice, North America, on August 18, 2026.
We have completed our investigation and determined that this event did not result in any customer impact. All systems are operating normally.
Affected components
Update timeline
- investigating Aug 18, 2026, 02:56 PM UTC
Twilio customers may be experiencing voice call failures from network subscribers to Twilio United States 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.
- identified Aug 18, 2026, 03:57 PM UTC
Twilio customers may be experiencing voice call failures from T-Mobile network subscribers in the United States to a subset of Twilio United States Phone Numbers. 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.
- identified Aug 18, 2026, 03:58 PM UTC
Twilio customers may be experiencing voice call failures from T-Mobile network subscribers in the United States to a subset of Twilio United States Phone Numbers. 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.
- resolved Aug 18, 2026, 04:35 PM UTC
We have completed our investigation and determined that this event did not result in any customer impact. All systems are operating normally.
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