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

- Provider: [Twilio](https://down.guide/twilio)
- Level: confirmed
- Impact: Degraded
- lasted 3h 17m
- started 2026-10-20 05:28 UTC
- Verify Silent Network Auth
- us
- id: DWN-65c3306411
- Official page: https://stspg.io/g83v994n3wvv

## Updates from Twilio
### 2026-10-20 05:28 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.

### 2026-10-20 05:39 UTC: 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.

### 2026-10-20 06:44 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.

### 2026-10-20 08:45 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 4 hours or as soon as more information becomes available.

### 2026-10-20 08:45 UTC: resolved
The incident has been resolved and API transactions for Silent Network Authentication (SNA) on AT&T in the United States are operating normally.

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