NOTICE

The NOTICE command is used to send notices to other users or channels.
Sending a Notice
Usage: NOTICE <target> :<message>

Sends a notice to the specified <target>, which can be a user or a channel.

Sending a Notice to Members of a Channel
Usage: NOTICE <channel> [<nicklist>] :<message>

Sends a notice to the users specified in the <nicklist> on the given <channel>. The <nicklist> is a comma-separated list of nicknames. When sending notices to users on a channel using a nicklist, the targeted users will not receive a list of other recipients.


(See sections 4.4.2 of RFC 1459, 3.3.2 of RFC 2812 and 5.10 of IRCX)