# Twilio: Incident updated: SMS Delivery Failures from a Subset of Twilio Alphanumeric Sender IDs to Jazz Pakistan

**Summary:** _summary pending_
- Kind: Incident update · Label: not classified yet
- Changed: 2026-10-21 16:53 UTC · Detected: 2026-10-21 16:53 UTC
- [Source: https://stspg.io/d8km5rfd3wbx](https://stspg.io/d8km5rfd3wbx)
- [Company: Twilio](https://rewindex.com/company/twilio.md)
- Versions: before incident\_version:125/y0t9h120wvwv@5a807f0f7ea2 → after incident\_version:125/y0t9h120wvwv@fce879a6588a
- Change 1 of 5 for this incident

Incident page (full timeline): [SMS Delivery Failures from a Subset of Twilio Alphanumeric Sender IDs to Jazz Pakistan](https://rewindex.com/company/twilio/incidents/y0t9h120wvwv.md)
## What changed

**1. Changed: Status**

```diff
- investigating
+ identified
```

**2. Added: Update** (identified) · 2026-10-21 16:49 UTC

```diff
+ Twilio customers may be experiencing SMS delivery failures from a subset of Twilio Alphanumeric Sender IDs to Jazz network subscribers in Pakistan. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-10-21 16:53 UTC | Incident updated: SMS Delivery Failures from a Subset of Twilio Alphanumeric Sender IDs to Jazz Pakistan (this change) |  |
| 2026-10-21 18:03 UTC | [Incident updated: SMS Delivery Failures from a Subset of Twilio Alphanumeric Sender IDs to Jazz Pakistan](https://rewindex.com/change/r7534ea533de128.md) |  |
| 2026-10-21 20:03 UTC | [Incident updated: SMS Delivery Failures from a Subset of Twilio Alphanumeric Sender IDs to Jazz Pakistan](https://rewindex.com/change/r01d52d3249cc21.md) |  |
| 2026-10-21 21:13 UTC | [Incident updated: SMS Delivery Failures from a Subset of Twilio Alphanumeric Sender Type to Jazz Pakistan](https://rewindex.com/change/rc2673e0419823c.md) |  |
| 2026-10-21 22:53 UTC | [Incident updated: SMS Delivery Failures from a Subset of Twilio Alphanumeric Sender Type to Jazz Pakistan](https://rewindex.com/change/r6783e34b42598a.md) |  |

Next: [change](https://rewindex.com/change/r7534ea533de128.md) · All Twilio changes: [timeline](https://rewindex.com/company/twilio/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/rfbc4473af91850 · Markdown: https://rewindex.com/change/rfbc4473af91850.md · JSON: https://rewindex.com/api/v1/changes/rfbc4473af91850 · Generated 2026-10-22T00:29:10.138Z