Past incident

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

SendGrid · Minor · Started

Duration
Unavailable
Severity
Minor
Status
No longer listed as active

Summary

Minor · No longer listed as active

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.

View official incident ↗

Event timeline

How this incident unfolded, from the official status page.

  1. Investigating

    SendGrid

    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.

  2. Identified

    SendGrid

    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.

  3. Monitoring

    SendGrid

    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.