Names

Usage /NAMES [<channel>{,<channel>}]

Gives a list of nicknames on any channel visible to the user(not secret
or private, or one actually joined by the user performing the command).

EXAMPLES:

/NAMES #amiga,#amigaGER
     Will list all users on channels #amiga and #amigaGER, provided the
     channels are visible to the user.

/NAMES
     Will return a list of all visible channels and users (Strongly
     Discouraged!)