# SMS Delivery Delays and Failures from a Subset of Twilio Short Codes to Cellularone United States

- Provider: [Twilio](https://down.guide/twilio)
- Level: confirmed
- Impact: Degraded
- lasted 7h 29m
- started 2026-05-03 23:29 UTC
- SMS Short Code, North America
- us
- id: DWN-f9e35941b8
- Official page: https://stspg.io/dtc2247kfns9

## Updates from Twilio
### 2026-05-03 23:29 UTC: identified
Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Short Codes to Cellularone NE Arizona network subscribers in the United States. 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.

### 2026-05-04 00:30 UTC: identified
Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Short Codes to Cellularone network subscribers in the United States. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

### 2026-05-04 02:32 UTC: monitoring
We have observed a recovery in SMS delivery from a subset of Twilio Short Codes to Cellularone NE Arizona network subscribers in the United States and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

### 2026-05-04 04:32 UTC: monitoring
We have observed a recovery in SMS delivery from a subset of Twilio Short Codes to Cellularone NE Arizona network subscribers in the United States and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

### 2026-05-04 06:58 UTC: resolved
The incident has been resolved and SMS delivery from a subset of Twilio Short Codes to Cellularone network subscribers in the United States is operating normally.

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