This section lists all of the possible channel modes that may be used with /MODE

v = Gives Voice to the user (May talk if chan is +m)
h = Gives HalfOp status to the user (Limited op access)
o = Gives Operator status to the user
a = Gives Channel Admin to the user
q = Gives Owner status to the user
b = Bans the nick!ident@host from the channel [h] (For more info on extended bantypes, see /HELPOP EXTBANS)
c = Block messages containing mIRC color codes [o]
C = No CTCPs allowed in the channel [h]
D = Delay showing joins until someone actually speaks [o]
e = Overrides a ban for matching users [h]
f = Flood protection (for more info see /HELPOP CHMODEF) [o]
G = Filters out all Bad words in messages with [o]
i = A user must be invited to join the channel [h]
I = Overrides +i for matching users [h]
k = Users must specify to join [h]
K = /KNOCK is not allowed [h]
L = Channel link (If +l is full, the next user will auto-join ) [q]
l = Channel may hold at most of users [h]
m = Moderated channel (only +vhoaq users may speak) [h]
M = Must be using a registered nick (+r), or have voice access to talk [h]
N = No Nickname changes are permitted in the channel [h]
n = Users outside the channel can not send PRIVMSGs to the channel [h]
O = IRC Operator only channel (settable by IRCops)
p = Private channel [o]
P = Permanent channel (the channel is not destroyed when empty) (settable by IRCops)
Q = No kicks allowed [o]
R = Only registered (+r) users may join the channel [h]
r = The channel is registered (settable by services only)
s = Secret channel [o]
S = Strips mIRC color codes [o]
T = No NOTICEs allowed in the channel [o]
t = Only +hoaq may change the topic [h]
V = /INVITE is not allowed [o]
z = Only Clients on a Secure Connection (SSL) can join [o]
Z = All users on the channel are on a Secure connection (SSL) [server] (This mode is set/unset by the server. Only if the channel is also +z)

[h] requires at least halfop, [o] requires at least chanop, [q] requires owner