I tried searching but was surprised to find no ready answers for this.. I'm trying to determine the App-ID policy to explicitly block or allow voice calling over wifi (or wifi calling) on Verizon, AT&T, etc. I can't seem to find this in App-ID's database.
This is largely to do with the fact that there really isn't any standard answer for this across all phones/carriers. This is something that is part of the network provisioning process you may have seen if you swapped a sim card between different carrier devices. Assuming 80/443 access these are the following.
Primarily uses udp/500 and udp/4500.
Largely utilizes 220.127.116.11/16 if looking to limit to IP ranges.
udp/500, udp/4500, tcp/143.
500/udp, 4500/udp, 5061/udp, 443/tcp, 994/tcp, 5061/tcp
I think they also use 500/udp but could be wrong here.
3478-3497/udp, 16384-16387/udp, 16393-16402/udp, 5223/tcp.
This also allows iMessage access.
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