Twilio incident
SMS Delivery Delays from a Subset of Twilio Long Codes and Toll-Free Numbers to Viaero United States
Twilio experienced a minor incident on May 21, 2026 affecting SMS Long Code, North America and SMS Toll-Free, North America and 1 more component, lasting 4h 36m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating May 21, 2026, 05:35 PM UTC
Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Long Codes and Toll-Free Numbers to Viaero 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.
- identified May 21, 2026, 05:54 PM UTC
Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Long Codes and Toll-Free Numbers to Viaero 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 21, 2026, 07:00 PM UTC
Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Long Codes and Toll-Free Numbers to Viaero 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 21, 2026, 08:10 PM UTC
We have observed a recovery in SMS delivery from a subset of Twilio Long Codes and Toll-Free Numbers to Viaero 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.
- resolved May 21, 2026, 10:12 PM UTC
The incident has been resolved and SMS delivery from a subset of Twilio Long Codes and Toll-Free Numbers to Viaero network subscribers in the United States is operating normally.