Ciptex incident
Voice call failures from a subset of Twilio phone numbers to Switzerland
Ciptex experienced a minor incident on September 4, 2026 affecting Twilio Voice, Europe, lasting 1d. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Sep 04, 2026, 09:08 PM UTC
We have detected potential service disruption through our monitoring systems and are actively investigating. A detailed assessment of the impact and affected services will be provided within the next 30 minutes.
- investigating Sep 04, 2026, 10:02 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. Twilio engineers are actively investigating this issue.
- identified Sep 05, 2026, 07:50 AM UTC
Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to network subscribers in Switzerland. Twilio 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.
- identified Sep 05, 2026, 12:13 PM UTC
Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to network subscribers in Switzerland. Twilio has identified the cause, and is working to resolve the issue. We will update you when more information becomes available.
- monitoring Sep 05, 2026, 03:39 PM UTC
Twilio 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 as soon as more information becomes available.
- resolved Sep 05, 2026, 10:05 PM UTC
Following comprehensive monitoring, we can confirm that the incident has been fully resolved and all services have returned to normal operation.