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INCIDENT RESOLVED
Twilio
✓SMS Delivery Failures From a Subset of Twilio Short Codes and Long Codes to AT&T United States
Updated
Resolved
11:58Started
2Timeline events
Confirmed by the official source.
Executive summary
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Summary
Twilio reported SMS delivery failures affecting a subset of Short Codes and Long Codes when sending to AT&T network subscribers in the United States. Twilio later reported recovery for the affected Long Code traffic and continued monitoring service stability.
What users experienced
- User impact
Some Twilio customers may have experienced SMS delivery failures to AT&T network subscribers in the United States, involving a subset of Short Codes and Long Codes.
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Started
11:589 Sep 2026Timeline of the incident
-
Detection
Confirmed by an official service source.
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Resolution
The service is no longer reporting this incident as active.
What we know
- ✓Twilio initially reported the issue as under investigation.
- ✓Twilio later reported that the cause had been identified and work to resolve the issue was underway.
- ✓Twilio reported recovery for a subset of Long Code traffic and placed the incident in monitoring.
- ✓Twilio's reported impact level was minor.