channel modes
This KB article is available in the following languages: Russian

Channel modes can only be modified by channel operators, which are those who have a @ next to their nickname. Certain channel modes require additional parameters along with the actual switch, others do not.

For more information on channel modes, go to

You can combine several different mode changes in one command, provided you respect the order of the parameters. With Bahamut, six mode changes can be applied at once.


/mode #channelname +/- mode(s) parameters

/mode #peanutbutter +nt
/mode #peanutbutter -ps
/mode #peanutbutter +nt-R
/mode #peanutbutter +ntv-obb MissPeanut BadTastingPeanut *!* *!*

+b - channel bans. This allows a channel operator to deny a person (or a group of people) access to the channel. If someone is banned while in the channel, they will not be able to talk. This additional feature is known as the +bquiet mode, although the actual mode is still just +b. In addition /part messages will be supressed. However, this will not affect anyone having the except mode +e on his host which is discussed below.


/mode #channelname +/-b [hosts]

/mode #peanutbutter +b-bb *!* *!*@*.ca *!~@*
If you don't specify any hosts, you will be shown a list of channel bans, even if you're outside the channel.

A more detailed document on banning is available at

+c - stands for 'colourless'. If a message sent to the channel contains colour or bold, underline, reverse, etc., the message will be blocked as if the channel was moderated for that person.

+e - stands for 'except' this excepts users who match a hostmask in the banlist allowing them to join. When a hostmask is set in the except list,the mode +e overrides the ban on the user that matches the hostmask.


/mode #channelname +/-e [hosts]

/mode #peanutbutter +e PJKevin!*@*.my

+i - invite only. This will only allow those who have been invited to the channel (with the /invite command or in the channel's invite list) to join the channel.

+I - allows a channel operator to set a list of users who are allowed to join a +i (invite only) channel.


/mode #channelname +/-I [hosts]

/mode #peanutbutter +I PJKevin!*@*.my

Note: Please note that this mode does not override bans set in the channel.

+j - for Channel join throttling. It is useful to control join floods by determining the N number of users to join in S seconds.


/mode #channelname +/-j N:S

/mode #peanutbutter +j 4:5
In the above example, #peanutbutter has been set +j with the throttle value of 4 users in 5 seconds. The first value may not be set lower then 4

+k - this sets a password or 'key' on the channel. The key of the channel is a word that you must specify in your /join command when attempting to enter the channel. If the key is incorrect or if no key was specified then you will be denied access to this channel.


/mode #channelname +/-k key

/mode #peanutbutter +k jam

Anybody joining the channel will need to use the /join #channelname key command. In our case, it would be /join #peanutbutter jam

+l - sets a channel limit. You can to specify the maximum number of users who can be in the channel at a time. Once this number has been reached, anyone who attempts to join the channel will receive an error message of the channel being full.


/mode #channelname +/-l number

/mode #peanutbutter +l 25

+m - this means a channel is moderated. A moderated channel only allows the ops (@) and voices (+) to send messages to the channel. All other messages will be blocked. Anyone who is present in a moderated channel and who is not an op or voice there will also be prevented from changing their nickname.

+M - means only registered nicks may talk. Only those who are set to umode +r are allowed to speak in the channel although anybody may join. Unregistered nicks who are on a channel after +M is set will lose the ability to send messages to the channel until they become umode +r.

+n - stands for no external messages. If +n is not set then it's possible for someone to send messages to the channel if they are not present inside the channel.

+o - this mode is used to set someone as an 'op' or channel operator. A channel operator is designated by the @ next to their nick. This @ translates into the giving and removal of the +o mode. Some IRC clients may use a symbol other than @ for pointing out channel ops, however they are few and far between.


/mode #channelname +/-o nickname(s)

/mode #peanutbutter +oo-o MissPeanut PeanutButterLover CheekyBrat

A channel operator has the ability to kick/ban people from the channel in addition to being one of the only ones who can change the channel modes of the channel.

+O - stands for oper only. Basically, it only allows those with umode +o (IRC Operators) to join the channel. This mode can only be set by an IRC Operator.

+p - private channel. A private channel is not shown on the WHOIS output unless the person requesting the WHOIS is also on the channel.

+R - stands for registered nicknames only. As its name implies, only those who are using and have identified to their current nickname (in other words, those who are set to umode +r) are allowed to enter the channel.

+s - Secret channel. A secret channel is not shown on the WHOIS output unless the person requesting the WHOIS is also on the channel. In addition to this, a secret channel doesn't show up on a channel LIST request either.

There's no need to set the +p mode if you already have +s set, as it would be redundant.

+t - When +t is set, only the ops of the channel can change the topic.

+v - whis sets a user as having a 'voice' or a + in front of their nick in the channel (ops have an @). When a channel is moderated or has +m set, only the channel ops and the channel voices can send messages to the channel. Only channel ops can add or remove voices.


/mode #channelname +/-v nickname(s)


/mode #peanutbutter +vv-v MissPeanut PeanutButterLover CheekyBrat

It should be noted that in many places, voiced users are considered as the friends of the ops and are often treated as ops in training. This is, however, not true for all channels.

KB #63
Category: Frequently Asked Questions
Added by: RedPepper
Added on: 13/01/2009 22:15
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