# Voice Call Failures from a Subset of Twilio Phone Numbers to Switzerland

- Provider: [Twilio](https://down.guide/twilio)
- Level: confirmed
- Impact: Degraded
- lasted 1d 1h
- started 2026-09-04 20:55 UTC
- Voice, Europe
- eu
- id: DWN-ba5362d3d3
- Official page: https://stspg.io/8dmk6mw2yw7k

## Updates from Twilio
### 2026-09-04 20:55 UTC: investigating
Twilio customers may be experiencing voice call failures from a subset of Twilio Toll-Free, Landline, and Mobile Phone Numbers to network subscribers on multiple networks in multiple countries. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

### 2026-09-04 21:55 UTC: investigating
Twilio customers may be experiencing voice call failures from a subset of Twilio Toll-Free Numbers, Landline Numbers, and Mobile Numbers to network subscribers on multiple networks in multiple countries. Our team is actively investigating this issue. We will provide another update in 2 hours or as soon as more information becomes available.

### 2026-09-04 23:18 UTC: investigating
Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to network subscribers in the Netherlands, Switzerland, and Iceland. Our team is actively investigating this issue. We will provide another update in 4 hours or as soon as more information becomes available.

### 2026-09-04 23:56 UTC: investigating
Twilio customers may be experiencing voice call failures from a subset of Twilio Toll-Free, Landline, and Mobile Phone Numbers to network subscribers on multiple networks in multiple countries. Our team is actively investigating this issue. We will provide another update in 4 hours or as soon as more information becomes available.

### 2026-09-05 01:18 UTC: identified
Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to network subscribers in Switzerland. 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.

### 2026-09-05 02:18 UTC: identified
Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to network subscribers in Switzerland. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

### 2026-09-05 04:18 UTC: identified
Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to network subscribers in Switzerland. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

### 2026-09-05 08:24 UTC: identified
Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to network subscribers in Switzerland. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

### 2026-09-05 15:28 UTC: monitoring
We have observed a recovery in voice calls from a subset of Twilio Phone Numbers to network subscribers in Switzerland and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

### 2026-09-05 17:34 UTC: monitoring
We have observed a recovery in voice calls from a subset of Twilio Phone Numbers to network subscribers in Switzerland and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

### 2026-09-05 21:40 UTC: monitoring
We have observed a recovery in voice calls from a subset of Twilio Phone Numbers to network subscribers in Switzerland and are monitoring service stability. We will provide another update in 8 hours or as soon as more information becomes available.

### 2026-09-05 22:04 UTC: resolved
The incident has been resolved and voice calls from a subset of Twilio Phone Numbers to network subscribers in Switzerland are operating normally.

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