Heymarket incident
SMS Delivery Failures from a Subset of AT&T Numbers in the United States
Resolved after 51 minutes, affecting Messaging and Twilio SMS and 1 more, on September 9, 2026.
We have observed a recovery in SMS delivery from a subset of phone numbers to AT&T network subscribers in the United States and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.
Affected components
Update timeline
- identified Sep 09, 2026, 07:36 PM UTC
Customers may be experiencing SMS delivery failures from a subset of phone numbers to AT&T network subscribers in the United States. Our Carrier Team has identified the cause and is working to resolve the issue. We will provide another update as soon as more information becomes available.
- identified Sep 09, 2026, 07:36 PM UTC
We are continuing to work on a fix for this issue.
- monitoring Sep 09, 2026, 08:47 PM UTC
We have observed a recovery in SMS delivery from a subset of phone numbers to AT&T network subscribers in the United States and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.
- resolved Sep 09, 2026, 10:51 PM UTC
This incident has been resolved.
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