# Delayed delivery of 10DLC SMS messages to AT&T destinations

- Provider: [Telnyx](https://down.guide/telnyx)
- Level: confirmed
- Impact: Partial outage
- lasted 1d 1h
- started 2026-10-06 17:38 UTC
- NORAM
- id: DWN-04a4289741
- Official page: https://status.telnyx.com/incidents/01M494R618XA43M57FD9HH3SSG

## Root cause
> Our team is working with our downstream partner and AT&T to identify the cause and restore normal processing.

[Postmortem](https://status.telnyx.com/incidents/01M494R618XA43M57FD9HH3SSG)

## Updates from Telnyx
### 2026-10-06 17:38 UTC: investigating
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.

### 2026-10-07 13:03 UTC: monitoring
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.

### 2026-10-07 19:30 UTC: resolved
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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