IRCServ:NickServ

NickServ allows you to "register" a nickname and
prevent others from using it. The following
commands allow for registration and maintenance of
nicknames; to use them, type /msg NickServ command.
For more information on a specific command, type
/msg NickServ HELP command.
 
    REGISTER   Register a nickname
    GROUP      Join a group
    GLIST      Lists all nicknames in your group
    IDENTIFY   Identify yourself with your password
    ACCESS     Modify the list of authorized addresses
    SET        Set options, including kill protection
    DROP       Cancel the registration of a nickname
    RECOVER    Kill another user who has taken your nick
    RELEASE    Regain custody of your nick after RECOVER
    GHOST      Disconnects a "ghost" IRC session using your nick
    ALIST      List channels you have access on
    INFO       Displays information about a given nickname
    LIST       List all registered nicknames that match a given pattern
    LOGOUT     Reverses the effect of the IDENTIFY command
    STATUS     Returns the owner status of the given nickname
    UPDATE     Updates your current status, i.e. it checks for new memos
    AJOIN       Manipulate the AutoJoin list.
 
Nicknames that are not used anymore are subject to 
the automatic expiration, i.e. they will be deleted
after 37 days if not used.
 
NOTICE: This service is intended to provide a way for
IRC users to ensure their identity is not compromised.
It is NOT intended to facilitate "stealing" of
nicknames or other malicious actions.  Abuse of NickServ
will result in, at minimum, loss of the abused
nickname(s).