Twilio incident: SMS Delivery Delays from a Subset of Twilio Short Codes to Cellularone NE Arizona United States

Affected components

• SMS Short Code, North America

1. resolvedSep 25, 2026, 22:23 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.

2. monitoringSep 25, 2026, 20:15 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.

3. identifiedSep 25, 2026, 16:35 UTC

   Twilio customers may be experiencing SMS delivery delays 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 8 hours or as soon as more information becomes available.

4. identifiedSep 25, 2026, 12:35 UTC

   Twilio customers may be experiencing SMS delivery delays 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 4 hours or as soon as more information becomes available.

5. identifiedSep 25, 2026, 10:34 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 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.

6. identifiedSep 25, 2026, 09:33 UTC

   Twilio customers may be experiencing SMS delivery delays 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.

7. investigatingSep 25, 2026, 05:24 UTC

   Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Short Codes to Cellularone NE Arizona network subscribers in the United States. Our team is actively investigating this issue. We will provide another update in 4 hours or as soon as more information becomes available.

8. investigatingSep 25, 2026, 03:24 UTC

   Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Short Codes to Cellularone NE Arizona 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.

9. investigatingSep 25, 2026, 02:24 UTC

   Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Short Codes to Cellularone NE Arizona 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.

What APIStatus.watch saw

Our 5-minute checks didn't record a change in Twilio's overall status around this incident. Smaller or regional incidents often leave a provider's overall status green.

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How often does Twilio have incidents?

Twilio reported 501 incidents in the last 90 days, 2 of them major or critical. A typical incident lasted 5h 49m. See Twilio's uptime and incident history