Silent Network Authentication (SNA) Failure Increase on AT&T in United States

Incident Report for Twilio

Resolved

The incident has been resolved and API transactions for Silent Network Authentication (SNA) on AT&T in the United States are operating normally.

Posted Oct 20, 2026 - 01:45 PDT

Update

We have observed recovery in API transactions for Silent Network Authentication (SNA) on AT&T 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.

Posted Oct 20, 2026 - 01:45 PDT

Monitoring

We have observed recovery in API transactions for Silent Network Authentication (SNA) on AT&T 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 Oct 19, 2026 - 23:44 PDT

Identified

Twilio customers may be experiencing verification failures during API transactions for Silent Network Authentication (SNA) on AT&T in the United States. API transactions may temporarily fail over to secondary methods like SMS OTP. 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 Oct 19, 2026 - 22:39 PDT

Investigating

Twilio customers may be experiencing verification failures during API transactions for Silent Network Authentication (SNA) on AT&T in the United States. Our team is actively investigating the issue. API transactions may temporarily fail over to secondary methods like SMS OTP. We will provide another update in 1 hour or as soon as more information becomes available.

Posted Oct 19, 2026 - 22:28 PDT

This incident affected: CARRIER NETWORK (Verify Silent Network Auth).