# Subset of Inbound Calls from AT&T are Failing Shaken/Stir Verification

- Provider: [Twilio](https://down.guide/twilio)
- Level: confirmed
- Impact: Degraded
- lasted 4h 56m
- started 2026-06-03 18:40 UTC
- Voice, North America
- us
- id: DWN-aff4026682
- Official page: https://stspg.io/kvkj0v3dgzqv

## Updates from Twilio
### 2026-06-03 18:40 UTC: investigating
Our monitoring systems have detected a potential issue with Shaken/Stir validation for a subset of inbound calls. Our engineers have been alerted and are investigating. We will provide an update when we have more details.

### 2026-06-03 19:42 UTC: investigating
Twilio customers may be experiencing Shaken/Stir verification failures for inbound calls originating from the AT&T network the United States. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

### 2026-06-03 20:42 UTC: investigating
Twilio customers may be experiencing Shaken/Stir verification failures for inbound calls originating from the AT&T network the United States. Our team is actively investigating this issue. We will provide another update in 2 hours or as soon as more information becomes available.

### 2026-06-03 23:03 UTC: monitoring
We have started seeing recovery for Shaken/Stir verification failures for inbound calls originating from the AT&T network the United States. We will continue to monitor to ensure a full recovery. We expect to provide another update in 30 minutes or as soon as more information becomes available.

### 2026-06-03 23:36 UTC: resolved
The issues for Shaken/Stir verification failures for inbound calls originating from the AT&T network the United States has been resolved and it is operating normally at this time.

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