When you connect to a server you should see a line or two something like this:
WHOX WALLCHOPS WALLVOICES USERIP CPRIVMSG CNOTICE SILENCE=15 MODES=6 MAXCHANNELS=20 MAXBANS=45 NICKLEN=15 TOPICLEN=250 AWAYLEN=160 KICKLEN=250 are supported by this server
The bold is what you are interested in.
