Outage of outbound calls to Czech mobile and landline numbers

Update timeline

1. investigating Apr 27, 2026, 08:07 AM UTC

   Status: Investigating We are currently experiencing an outage affecting outbound VoIP calls to Czech Republic phone numbers (prefix +420). Customers attempting to dial these destinations may encounter immediate call drops or error messages. Affected components Outbound calls (Partial outage)

2. identified Apr 27, 2026, 08:10 AM UTC

   Status: Identified Our engineering team has completed their initial diagnostics and confirmed that our internal VoIP infrastructure and network are functioning normally. We have successfully isolated the root cause of the outage to an upstream international carrier partner responsible for routing outbound traffic to the Czech Republic. The carrier is currently experiencing network instability on their end, which is preventing these calls from completing. Affected components Outbound calls (Partial outage)

3. resolved Apr 27, 2026, 10:47 AM UTC

   Status: Resolved Issue has been fully resolved. Affected components Outbound calls (Operational)