| +a | Admin-Only: Requires users to be a Server Administrator to /JOIN | IRC Operator | /mode #channel +a |
| +b | Ban: Bans users who match from joining or speaking | +o (@) | /mode #channel +b *!*user@*.host.tld |
| +b ~n:~_: | Extban Action: No Nick Changes Prevents matching users from changing nicknames | +o (@) | /mode #channel +b ~n:~a:AccountName |
| +b ~q:~_: | Extban Action: Quiet Prevents matching users from speaking | +o (@) | /mode #channel +b ~q:~a:AccountName |
| +b ~a:Account | Extban Match: Account Bans users logged in as 'Account' from joining -- can also be used with an Extban Action | +o (@) | /mode #channel +b ~a:Account |
| +b ~c:#Channel2 | Extban Match: Channel Bans users who are in #Channel2 from joining | +o (@) | /mode #channel +b ~c:#Channel2 |
| +b ~j:#Channel2 | Extban Match: Link banlist Links the banlist from #Channel2 | +o (@) | /mode #channel +b ~J:#channel2 |
| +b ~r:*bot* | Extban Match: Realname Bans users with 'bot' in their realname (gecos) | +o (@) | /mode #channel +b ~r:*bot* |
| +c | No Colors: Blocks color codes from being sent to the channel | +o (@) | /mode #channel +c |
| +C | No-CTCPs: Blocks mass-CTCP requests to the channel | +o (@) | /mode #channel +C |
| +D | Delayed Joins: Hides join-events until the user has a mode set on them (+v or +o) | +o (@) | /mode #channel +D |
| +d | Was Delayed Joins: Replaces +D when there are still hidden users on the channel | | |
| +i | Invite Only: Prevents users from /JOIN'ing unless they are /INVITE'd | +o (@) | /mode #channel +i |
| +k | Keyed: Sets a passphraze on the channel, required for users to /JOIN | +o (@) | /mode #channel +k passphrase |
| +l | Limit: Sets a limit of how many users may JOIN the channel | +o (@) | /mode #channel +l 30 |
| +L | Channel Link/Redirect: Sets a Linked Channel that users attempting to JOIN will be redirected to | +o (@) | /mode #channel +L #NewChannel |
| +m | Moderated: Only users with VOICE (+v) can speak | +o (@) | /mode #channel +m |
| +M | Registered-Moderated: Only registered (and logged in) users can speak | +o (@) | /mode #channel +M |
| +n | No outside messages: Prevents users from speaking when they have not /JOIN'd | +o (@) | /mode #channel +n |
| +N | No Channel-Notices: Prevents users from sending NOTICEs to the channel | +o (@) | /mode #channel +N |
| +o | Channel Operator: Gives channel operator status to a user | +o (@) | /mode #channel +o Nickname |
| +O | IRC Operators-only: Only IRC Operators may /JOIN | +o (@) | /mode #channel +O |
| +p | Private: Sets the channel as private | +o (@) | /mode #channel +p |
| +Q | Hide QUIT/PART messages: Hides all /QUIT and /PART messages | +o (@) | /mode #channel +Q |
| +r | Registered Users-Only: Only registered (and logged in) users may /JOIN | +o (@) | /mode #channel +r |
| +R | Channel is Registered: Marks the channel as registered with X | X / Servers | Can only be set by X and IRC servers |
| +s | Secret: Channel does not show up in /LIST or /WHOIS | +o (@) | /mode #channel +s |
| +S | Strip Codes: Removes all colors and effects on messages | +o (@) | /mode #channel +S |
| +t | Only Ops can set TOPIC: Only channel ops can change the channel topic | +o (@) | /mode #channel +t |
| +T | No Multi-Target Messages: Prevents messages sent by /AMSG and /AME | +o (@) | /mode #channel +T |
| +v | Voice: Allows user to speak during Moderation (+m) | +o (@) | /mode #channel +v Nickname |
| +z | Persistent Channel: Channel will stay open persistently, even if empty | IRC Operator | Can only be set by IRC Operators |
