Twilio incident
SMS Delivery Delays from a Subset of Twilio Short Codes to Cellularone NE Arizona United States
Resolved after 17 hours 46 minutes, affecting SMS Short Code, North America, on October 21, 2026.
The incident has been resolved and SMS delivery from a subset of Twilio Short Codes to Cellularone NE Arizona network subscribers in the United States is operating normally.
Affected components
Update timeline
- investigating Oct 21, 2026, 05:10 PM UTC
Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Short Codes to Cellularone network subscribers in the United States. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.
- investigating Oct 21, 2026, 06:11 PM UTC
Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Short Codes to Cellularone network subscribers in the United States. Our team is actively investigating this issue. We will provide another update in 2 hours or as soon as more information becomes available.
- monitoring Oct 21, 2026, 08:19 PM UTC
We have observed a recovery in SMS delivery from a subset of Twilio Short Codes to Cellularone 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 Oct 21, 2026, 10:20 PM UTC
We have observed a recovery in SMS delivery from a subset of Twilio Short Codes to Cellularone 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.
- monitoring Oct 22, 2026, 02:25 AM UTC
We have observed a recovery in SMS delivery from a subset of Twilio Short Codes to Cellularone network subscribers in the United States and are monitoring service stability. We will provide another update in 8 hours or as soon as more information becomes available.
- resolved Oct 22, 2026, 10:57 AM UTC
The incident has been resolved and SMS delivery from a subset of Twilio Short Codes to Cellularone NE Arizona network subscribers in the United States is operating normally.
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