Rainbow - Inbound/outbound calls issues on several trunks – Incident details

On December 24, 2025, between 05:30 and 14:00 CET, some Rainbow Hub companies experienced inbound and outbound call issues.
The incident was caused by a temporary network disruption, which led to an inconsistent NAT port handling on an intermediate component of the Rainbow Hub infrastructure. This affected several trunks, while the majority of services remained operational.
Corrective actions were applied, and the issue was fully resolved after a configuration update on the affected intermediate server.
All services have since been fully restored, and no other Rainbow services were impacted.

This incident has been resolved. We'll provide RCA soon

Remaining cases are identified, we work on fixes

We are currently monitoring the result

Several fixes have been applied, we monitor the system

We are continuing to work on a fix for this incident