Quiets use different numerics/raws and different syntax's depending on the IRCd.
(Just some IRCd's, others might support quiets also).
UnrealIRCd: /mode #channel +b ~q:*!*@KindOne.vhost
charybdis: /mode #channel +q *!*@KindOne.is.awesome
Luckily, UnrealIRCd shares the same numberics, so you can easily view them.
How to view quiets on UnrealIRCd:
/mode #channel b
:irc.foobar.org 367 KindOne #channel ~q:*!*@*KindOne.vhost KindOne 1339881551
:irc.foobar.org 368 KindOne #channel :End of Channel Ban List
Charybdis uses a totally different numeric, have to look at the status window or use a script.
How to view quiets on charybdis:
/mode #channel q
:irc.foobar.net 728 KindOne #channel q *!*@KindOne.is.awesome KindOne 1330184556
:irc.foobar.net 729 KindOne #channel q :End of Channel Quiet List
Numeric/raw 729 is already being used since mIRC 7.0 for 'ircd-hybrid-ru' according to some google searching.
80.Added support for whois numeric 729.
Bans are easy.. since all major IRCd's use numerics/raw 367/368 for the ban list specified in RFC 1459. It's the quiets that seem get complicated as there is no standard.