Twilio incident
SMS Delivery Delays and Failures from a Subset of Twilio Short Codes to Cellularone United States
Resolved after 7 hours 28 minutes, affecting SMS Short Code, North America, on May 3, 2026.
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.
Affected components
Update timeline
- identified May 03, 2026, 11:29 PM UTC
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.
- identified May 04, 2026, 12:30 AM UTC
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.
- monitoring May 04, 2026, 02:32 AM UTC
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.
- monitoring May 04, 2026, 04:32 AM UTC
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.
- resolved May 04, 2026, 06:58 AM UTC
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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