It should say how many 'minutes' you're banned for when you try to connect, such as 43200 minutes, aka 30 days. If you want an easy way to convert minutes to days, just put '### minutes to days' into google and it'll convert it for you.
You'll see the message like this when you try to connect.
Take minutes, google, enjoy. If you don't see minutes ot 'temporary', you might have been permabanned, in which case, lol...*** Banned Temporary K-line 43200 min. - [fiberOptiC] join/part flooding (tokenote: he means part flooding i guess since i wasnt joining anything.. it was the server doing it, i swear!) - visit http://kline.rizon.net/ if you believe this ban is an error. (2009/2/7 17.26)