My IP is city wide, and it's blacklisted...

[jamz]

From the TyD blacklist:

[SELECT ALL] Code:

24.32.245.237       // [2010-10-23] Nos_Energy - Abusing bug to play crap maps, offensive

This blacklist is used by many server owners. You'll need to speak nicely to the server owners, or (probably better) make a polite request to be debanned at the TyD forums.