ChangesTelnyxDelayed delivery of 10DLC SMS messages to AT&T destinations
Telnyx: Major incident: Delayed delivery of 10DLC SMS messages to AT&T destinations
Summary
Summary pending. The diff below shows exactly what changed.
Incident page: the full timeline of updates
What changed
Struck in red is what Telnyx removed; blue is what they added. Muted text is unchanged context.
Before: not present
After: Delayed delivery of 10DLC SMS messages to AT&T destinations
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After: major
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After: resolved
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After: 2026-10-06 17:38 UTC
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After: 2026-10-07 19:30 UTC
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After: We are investigating delays in the delivery of SMS messages sent over 10DLC long code numbers to AT&T subscribers, beginning October 6 at around 15:00 UTC. Messages are being accepted but may be delivered later than expected to AT&T handsets. Messages to other carriers are not affected. Our team is working with our downstream partner and AT&T to identify the cause and restore normal processing. We will provide further updates as more information becomes available.
Before: not present
After: Message processing has returned to normal, and all queued messages have been delivered. SMS messages sent over 10DLC long code numbers to AT&T subscribers are now being delivered without delay. We are continuing to monitor traffic closely while our downstream partner and AT&T complete their investigation into the root cause. We will post a final update once the incident is resolved.
Before: not present
After: Message processing has returned to normal, and all queued messages have been delivered. SMS messages sent over 10DLC long code numbers to AT&T subscribers continue being delivered without delay after monitoring period.
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History of this incident
Tuesday, October 6
1 incident change
- MajorMajor incident
Delayed delivery of 10DLC SMS messages to AT&T destinationsthis change