Silent Network Authentication (SNA) Failure Increase on AT&T in United States
View the provider incident record →Current answer
SendGrid experienced a minor incident: Silent Network Authentication (SNA) Failure Increase on AT&T in United States. ServiceAlert observed recovery on Oct 2, 2026.
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Incident Lifecycle
Affected Components
Verify Silent Network Auth
Incident Timeline
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 4 hours or as soon as more information becomes available.
Oct 2, 2026 at 12:40 PM UTC
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.
Oct 2, 2026 at 10:40 AM UTC
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 4 hours or as soon as more information becomes available.
Oct 2, 2026 at 10:02 AM UTC
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 2 hours or as soon as more information becomes available.
Oct 2, 2026 at 8:01 AM UTC
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.
Oct 2, 2026 at 6:56 AM UTC
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