Problem 3rd party connection

So I became aware of a problem connecting to a 3rd party that we use for additional information when rating quotes.  I believe the problem lies with the 3rd party's firewall.  I think it is limiting it to only a few class "C" subnets that we used to use.  Me being the rabble rouser that I am, I've dropped my users to a /21 subnet mask and move servers around to some /16 networks.  I'm thinking their firewalls are basically giving me the finger.  More to come.
-PC

p.s.  Yes I know that it has been eons since I last posted.  Given the fact that only my grandmother and one individual in the Balkans ever read my blog, I'm not all that concerned about how you feel.......ok maybe a little concerned.