Could you try look this output. ```sh [safarov@safarov-dell ~]$ kubectl exec -it proxy-dc0-0 -- sh Defaulting container name to proxy. Use 'kubectl describe pod/proxy-dc0-0 -n ippbx' to see all of the containers in this pod. / # hostname -f proxy-dc0-0.proxy-dc0.ippbx.svc.cluster.local / # hostname proxy-dc0-0 ``` Here pod `proxy-dc0-0` member of `proxy-dc0` statefulset in `ippbx` namespace. Think `kamailio` may use similar API calls.