Twilio incident
SMS Delivery Delays and Failures from a Subset of Twilio Alphanumeric Sender IDs to Mobile China
Resolved after 13 days 21 hours, affecting SMS, APAC, on October 9, 2026.
The incident has been resolved and SMS delivery from a subset of Twilio Alphanumeric Sender ID's to China Mobile network subscribers in China is operating normally.
Affected components
Update timeline
- investigating Oct 09, 2026, 06:42 AM UTC
Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Alphanumeric Sender IDs to China Mobile network subscribers in China. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.
- identified Oct 09, 2026, 07:05 AM UTC
Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Alphanumeric Sender IDs to China Mobile network subscribers in China. 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 Oct 09, 2026, 08:05 AM UTC
Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Alphanumeric Sender Type to Mobile network subscribers in China. 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.
- identified Oct 09, 2026, 10:25 AM UTC
Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Alphanumeric Sender Type to China Mobile network subscribers in China. 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.
- identified Oct 09, 2026, 02:31 PM UTC
Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Alphanumeric Sender Type to Mobile network subscribers in China. 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.
- monitoring Oct 09, 2026, 03:35 PM UTC
We have completed our investigation and determined that this event did not result in any customer impact. All systems are operating normally.
- resolved Oct 23, 2026, 03:55 AM UTC
The incident has been resolved and SMS delivery from a subset of Twilio Alphanumeric Sender ID's to China Mobile network subscribers in China is operating normally.
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