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

Affected components

• Verify Silent Network Auth

1. resolvedOct 2, 2026, 15:04 UTC

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

2. monitoringOct 2, 2026, 12:40 UTC

   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.

3. monitoringOct 2, 2026, 10:40 UTC

   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.

4. investigatingOct 2, 2026, 10:02 UTC

   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 4 hours or as soon as more information becomes available.

5. investigatingOct 2, 2026, 08:01 UTC

   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 2 hours or as soon as more information becomes available.

6. investigatingOct 2, 2026, 06:56 UTC

   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.

What APIStatus.watch saw

Our 5-minute checks didn't record a change in SendGrid's overall status around this incident. Smaller or regional incidents often leave a provider's overall status green.

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