Twilio outage on October 21, 2026: SMS Delivery Delays from a Subset of Twilio Short Codes to Cellularone NE Arizona United States
Twilio reported an incident affecting Twilio for 17 hours 46 minutes on 21 October 2026, from 17:10 to 10:57 UTC.
Resolved
Official incident reported by Twilio
- Started
- 17:10
- 21 Oct 2026 UTC
- Resolved
- 10:57
- 22 Oct 2026 UTC
- Duration
- 17h 46m
- 17 hours 46 minutes
- Impact
- Minor
- as rated by Twilio
- Updates
- 6
- posted by Twilio
Timeline
All times UTC.
Official incident from Twilio
SMS Delivery Delays from a Subset of Twilio Short Codes to Cellularone NE Arizona United States
-
Official
Investigating
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.
-
Official
Investigating
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.
-
Official
Monitoring
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.
-
Official
Monitoring
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.
-
Official
Monitoring
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.
-
Official
Resolved
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.
"Official" rows are quoted from Twilio's public status page, status.twilio.com. Very long posts are shortened.
What our checkpoints saw
HostTracker's checkpoints, which test www.twilio.com from several locations, recorded no outage of 5 minutes or longer during this incident. A provider can report a problem that affects only some features, regions or accounts, which a check of the main address does not see. The live Twilio status shows what our checks see right now.
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Independent measurement by HostTracker. Not affiliated with Twilio. Official updates are quoted from Twilio's public status page and remain Twilio's own words.