I doubt I'm IP banned, I tried to join Ravencroft's server once and had the issue, so I rtb'd and he told me he would ask cowboy22 or whoever.
Also, some of the servers I haven't even visited before have this issue. Some of the host's in which I had this issue were irc'd by me and they told me various stuff like restarting blockland, and never told me I was banned. But, that is a possibility, and I will ask more of them, thanks.