A web site listed an IRC number for support contact.  Using mIRC, or another
IRC client, how can I "call" this number? All documentation I have
found talks about joining a "channel", i.e., chat group, and then going on to a
private chat with someone who happens to already be logged into the
chat room -- but that does not seem to cover the case of someone
listing an IRC NUMBER for contact, as if he were giving out a telephone number.

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Request for Question Clarification by sublime1-ga on 25 Apr 2006 13:27 PDT

Are you sure it wasn't an ICQ number?

i think your either getting mixed up with "call" as in someones
username or i found a page that lists a number as IRC: 3333...etc but
this stands for the Intructional Resource Center
http://www.ashland.edu/library/irc/books.htm .

The only other explanation is that , "call" could be a custom function
of someones script. but you need to be logged on to the correct
network (and channel) and in any case this isn't the type of thing
your describing.

they could have also listed it as a number such as call #29293 this
could be a channel name, but they should have listed the network.

If the number had also dots between numbers ;-) then...
Maybe this number was the address of the IRC server. 
So You have to type : /server thisnumber

In mirc client, you can connect that server and prot by typing /server
name_of_server:port_number
I think IRC number may be port number.

I think you are looking for a CHANNEL that uses numbers only.
some wise guys in IRC will give you a ChannelName that is numbers only
and will identify them by #234-3456-789. Which can be a valid
Channel/Room.

The #(pound/number sign) is a designator for IRC channels. This has
been the standard since inception. just as @ for the separator in
email.

1. They should tell you which 'Undernet' server they will be on.
2. They should tell you the Channel name (which will be identified by
#ThisChannelName)
3. They should tell you their User Name.

There is a user to user messenger system but you have to be on the
same IRC server/networks (undernet for example)

There can be the same name on several different servers.
QuakeNet
EFNet
UnderNet
IRCNet 

These are some of the larger ones. With EFNet and the Undernet being some of 
the oldest.

See http://www.mirc.com/servers.html for more complete list


Hope that helps