# Telnyx: Major incident: Delayed delivery of 10DLC SMS messages to AT&T destinations

**Summary:** _summary pending_
- Kind: Major incident · Label: major (vendor)
- Changed: 2026-10-06 17:38 UTC · Detected: 2026-10-19 17:33 UTC
- [Source: https://status.telnyx.com/incidents/01M494R618XA43M57FD9HH3SSG](https://status.telnyx.com/incidents/01M494R618XA43M57FD9HH3SSG)
- [Company: Telnyx](https://rewindex.com/company/telnyx.md)
- Versions: before (none: first archived) → after incident\_version:705/01M494R618XA43M57FD9HH3SSG@de898bf6f1bf
- Change 1 of 1 for this incident

Incident page (full timeline): [Delayed delivery of 10DLC SMS messages to AT&T destinations](https://rewindex.com/company/telnyx/incidents/01M494R618XA43M57FD9HH3SSG.md)
## What changed

**1. Added: Title**

```diff
+ Delayed delivery of 10DLC SMS messages to AT&T destinations
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-10-06 17:38 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-10-07 19:30 UTC
```

**6. Added: Update** (investigating) · 2026-10-06 17:38 UTC

```diff
+ 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.
```

**7. Added: Update** (monitoring) · 2026-10-07 13:03 UTC

```diff
+ 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.
```

**8. Added: Update** (resolved) · 2026-10-07 19:30 UTC

```diff
+ 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.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-10-06 17:38 UTC | Major incident: Delayed delivery of 10DLC SMS messages to AT&T destinations (this change) | major |

All Telnyx changes: [timeline](https://rewindex.com/company/telnyx/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/i6f89f819fceb29 · Markdown: https://rewindex.com/change/i6f89f819fceb29.md · JSON: https://rewindex.com/api/v1/changes/i6f89f819fceb29 · Generated 2026-10-19T21:43:45.448Z