Originally posted here by therenegade
whois:it's a command on irc that lets you check if a particular nick is online...with a list of all the room's he's in and the ip(usually masked now though)
Hmm either online or just gives you more information about that nickname... listing all the rooms that nick appears on that aren't either private or secret.

Also, I know mode +x works on Undernet, don't know about other places - but will try out.