SMS Delivery Delays from a Subset of Twilio Long Codes and Toll-Free Numbers to Viaero United States

Incident Report for Twilio

Resolved

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.

Posted May 21, 2026 - 15:12 PDT

Monitoring

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.

Posted May 21, 2026 - 13:10 PDT

Update

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.

Posted May 21, 2026 - 12:00 PDT

Identified

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.

Posted May 21, 2026 - 10:54 PDT

Investigating

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.

Posted May 21, 2026 - 10:35 PDT

This incident affected: CARRIER NETWORK (SMS Long Code, North America, SMS Toll-Free, North America) and ZIPWHIP MESSAGING (SMS Toll-Free, North America).