Have setup a new SIP trunk provider (Tigo) but outgoing calls aren't connecting. Tigo claims it’s an internal routing issue between IPs 172.31.0.220 and 172.31.9.196, but want to know how I can troubleshoot/verify if this is a problem on the Vapi or Tigo side. Any help would be greatly appreciated.

@Angus B Tigo is correct - the IP addresses that you mentioned are referred to by IANA as "Private Routing" networks. These include the following ranges:

- 10.0.0.0/8 (or explicitly 10.0.0.0 -> 10.255.255.255)
- 192.168.0.0/24 (or explicitly 192.168.0.0 -> 192.168.255.255)
- 172.16.0.0/12 (or explicitly 172.16.0.0. -> 172.31.255.255)

This is why home network all seem to use the same networks all over the world 🙂 Now, based on what you wrote - I think you are presenting the wrong information to the various systems. Can you show us what Tigo sent you as the trunk information?

Thanks @Nir Simionovich (CEO@Cloudonix) , in the end this occurred because we were not routing requests to .sip.vapi.ai

Ok, cool

Hey, checking if this is resolved for you?