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

> Twilio status incident “Silent Network Authentication (SNA) Failure Increase on AT&T in United States” on 2026-10-20: impact minor (vendor’s label), 3.3 h, 5 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/twilio/incidents/sf1wgpv8z8hr
Last updated: 2026-10-20T08:53:04Z

- Impact (vendor’s label): minor
- Status: resolved · edited after publishing
- Started: 2026-10-20 05:28 UTC · Resolved: 2026-10-20 08:45 UTC · Duration: 3.3 h
- Updates: 5 · Affected components: CARRIER NETWORK - Verify Silent Network Auth, Verify Silent Network Auth
- [Vendor status page: https://stspg.io/g83v994n3wvv](https://stspg.io/g83v994n3wvv)
- [Company: Twilio](https://rewindex.com/company/twilio.md)

## Timeline of updates

- **investigating** 2026-10-20 05:28 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.
- **identified** 2026-10-20 05:39 UTC: 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.
- **monitoring** 2026-10-20 06:44 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.
- **monitoring** 2026-10-20 08:45 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.
- **resolved** 2026-10-20 08:45 UTC: The incident has been resolved and API transactions for Silent Network Authentication (SNA) on AT&T in the United States are operating normally.

## Rewindex changes for this incident

- 2026-10-20 05:43 UTC: [Incident updated: Silent Network Authentication (SNA) Failure Increase on AT&T in United States](https://rewindex.com/change/r5f99a5f26ca2ad.md)
- 2026-10-20 06:53 UTC: [Incident updated: Silent Network Authentication (SNA) Failure Increase on AT&T in United States](https://rewindex.com/change/rc6f5d153ec6cc0.md)
- 2026-10-20 08:53 UTC: [Incident updated: Silent Network Authentication (SNA) Failure Increase on AT&T in United States](https://rewindex.com/change/r2a1f33f6f64c92.md)

## Cite this

Status incident (vendor impact label: minor) posted by Twilio, started 2026-10-20 05:28 UTC, resolved after 3.3 h, 5 update(s); edited after publishing.

- Canonical URL: https://rewindex.com/company/twilio/incidents/sf1wgpv8z8hr
- Citation: Twilio, “Silent Network Authentication (SNA) Failure Increase on AT&T in United States” (2026-10-20 05:28 UTC). Archived by Rewindex: https://rewindex.com/company/twilio/incidents/sf1wgpv8z8hr (CC BY 4.0).
- Markdown link: `[Twilio: Silent Network Authentication (SNA) Failure Increase on AT&T in United States (2026-10-20)](https://rewindex.com/company/twilio/incidents/sf1wgpv8z8hr)`


---
Canonical: https://rewindex.com/company/twilio/incidents/sf1wgpv8z8hr · Markdown: https://rewindex.com/company/twilio/incidents/sf1wgpv8z8hr.md · JSON: https://rewindex.com/api/v1/companies/twilio/incidents/sf1wgpv8z8hr · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-05T18:17:49.976Z