Outage in Sinch
Delivery Issue United States - AT&T
Resolved MinorIncident Report
Summary AI Generated
Sinch experienced delivery issues affecting concatenated 10DLC SMS messages sent to AT&T customers in the United States, causing delayed message delivery. The incident lasted approximately 5.7 hours from May 6th at 14:00 UTC until May 7th at 21:50 UTC. A fix was implemented and the service was restored after monitoring confirmed the resolution.
We are currently observing delivery issues towards United States - AT&T
Estimated Incident Start Time: 2026-05-06 14:00 UTC
Impact: Delayed delivery for concatenated 10DLC MT messages submitted towards AT&T US.
We will update as soon as we have more information.
If you have any questions, please contact support@sinch.com.
Components affected
Sinch SMS - US - 10DLCTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
about 16 hours ago - at 05/07/2026 10:39PM
This incident has been resolved.
Estimated Incident Start Time: 2026-05-06 14:00 UTC
Incident End Time: 2026-05-07 21:50 UTC
MONITORING
about 17 hours ago - at 05/07/2026 09:52PM
A fix has been implemented and we are monitoring the results.
INVESTIGATING
about 20 hours ago - at 05/07/2026 07:04PM
We are continuing to investigate this issue.
INVESTIGATING
about 22 hours ago - at 05/07/2026 04:58PM
We are currently observing delivery issues towards United States - AT&T
Estimated Incident Start Time: 2026-05-06 14:00 UTC
Impact: Delayed delivery for concatenated 10DLC MT messages submitted towards AT&T US.
We will update as soon as we have more information.
If you have any questions, please contact support@sinch.com.
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