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

Update timeline

1. investigating Sep 04, 2026, 08:55 PM UTC

   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.

2. investigating Sep 04, 2026, 09:55 PM UTC

   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.

3. investigating Sep 04, 2026, 11:18 PM UTC

   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.

4. investigating Sep 04, 2026, 11:56 PM UTC

   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.

5. identified Sep 05, 2026, 01:18 AM UTC

   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.

6. identified Sep 05, 2026, 02:18 AM UTC

   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.

7. identified Sep 05, 2026, 04:18 AM UTC

   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.

8. identified Sep 05, 2026, 08:24 AM UTC

   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.

9. monitoring Sep 05, 2026, 03:28 PM UTC

   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.

10. monitoring Sep 05, 2026, 05:34 PM UTC

    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.

11. monitoring Sep 05, 2026, 09:40 PM UTC

    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.

12. resolved Sep 05, 2026, 10:04 PM UTC

    The incident has been resolved and voice calls from a subset of Twilio Phone Numbers to network subscribers in Switzerland are operating normally.