I have configured p-cscf ,icscf, scscf , hss in different vms and I am able to get the registration successful. I am using zoiper client and kamailio version 5.3.3.

After the registration , when I try to make a call, it is showing 

403 , Domain not served 

In my scscf TCP dump .

What is this error and how to solve this .

Kindly help me asap since I am facing this issue for a week and struggling to resolve it .

Thanks.