b - Ban
i - Invite
k - Keyed
l - Limit
m - Moderated
n - No External Messages
o - Channel Operator
p - Private (Marks the channel as private. Will not appear when other users do /list command.)
s - Secret (Hides the channel in the list)
r - Registered
t - Topic
v - Voice: Gives the user a voice when the channel is moderated (+m)
M - This mode is used in a forward moderated chat. If the channel is set to +m all the messages sent to the channel that cannot be viewed by other users will be sent to a +N channel both channel modes work together. Example of this mode /mode #channel +M #receivingchannel This mode can only be set by a server administrator.
N - This set to a channel that is receiving moderated messages from a +mM channel, it is a good way of scanning questions when you have a special event. To use both +M and +N modes you must be an IRCop and you must be a channel op in both channels. Example of this mode /mode #receivingchannel +N #channel This mode can only be set by a server administrator.
A - Auditorium (Scribe Only) Users are not always shown in the names list or when they join/part/change nicks to minimize scroll. This mode can only be set by a server administrator.
j - Java clients don\'t need the key to get into a +k channel. If not simultaneously used with +k the channel will only allow Java users in the channel and lock out all other clients.
e - This mode on a channel will prevent CTCP on the channel but will not prevent actions.
c - This mode will prevent colors from being sent to the channel
u - User Op: UOPs, you can set a user to +u, he/she will be identified with a - in front of their nickname.
y - Not available at this time
O - Channel Overflow, If you set a user limit in the channel and have mode +O on, it will redirect the users in the second channel Example: /mode #channel +Ol user limit #newchannel.
L - Language filtering. This is set on the server level, if filtering is enabled and you want language filters to be active in channels you must set this channel mode. Operators only.
R - Restricted
d - Nick change restriction. This channel mode will only allow 1 nickname change per user, from Guestxxxx to nickname. Does not affect IRC operators.
W - Not available at this time
w - Not available at this time