User Modes

Flag	Title	Description	Set on connect	Bypassable by an IRCop
C	No CTCP	Prevents users from sending CTCPs to you.	No	Yes
D	Deaf	Don't receive channel messages.	No	No
g	Caller ID	Only allows users you've /accept'ed to private message you.	No	Yes
G	Soft caller ID	Only allows users you've /accept'ed, or that are in at least one common channel to you to private message you.	No	Yes
i	Invisible	Prevents you from showing up in a wildcard /who command.	Yes	No
p	Private	Hides your channels and idle time in a /whois yourNick.	No	Yes
R	RegOnly	Only allows users who've identified to Nickserv to be able to private message you.	No	Yes
r	Registered	Only set by services. You get this when you are identified to NickServ.	No	-
S	SSL	Only set by the server. You get this when you connect via SSL.	Only if using SSL	-
W	CGI:IRC	Only set by the server. This means you are connected via either Qchat, RizonBNC, or Mibbit.	Only if using cgiirc	-
x	Cloaked	Hides part or all of your hostname.	Yes	-