> Turkey had its own FidoNet-style network called HitNet (with the prefix "8:" instead of "1:") back in the 90’s.

Given that FidoNet only went up to Zone 6, they could just leverage the same technical standards:

* https://en.wikipedia.org/wiki/FidoNet#Geographical_structure

I remember there being other "nets", but cannot for the life of me remember their names.