If you have been banned you will have received a ban code message - Below shows you the reason.
If you have lost the ban code, rejoin the server, it will display the ban code again for you.
Ban Durations - xD = Days, xM = Months xY = Years. Perm=Permanent ban.
AUTOMATIC TEAMKILL BAN - If accidental, our a bad command strike, then these are temporary bans that do not stay on your player record. They expire after 20 minutes AND a map change.
We manually check all of these daily and only convert those that were intentional to 'real' bans.
If you still do not understand your ban you can raise an enquiry HERE.
If you wish to appeal, then you can appeal your ban HERE.