| b | Can be used to get a list of ban (ACCESS DENY) entries. |
| d | Cloneable - When the room fills up, a new room will be created with the same name, plus a number between 1 and 99 (cannot be set by normal users). |
| e | Clone - This room is a clone of a room that is set to mode +d (cannot be set). |
| f | MSN's built-in profanity filter is being used (room creation only). |
| h | Hidden - Room is not shown on any sort of room listings (same as +s, can't be used with +p or +s). |
| i | Invite - Room is set as invite only. |
| k | Key - Room has an entry password set (same as PROP MEMBERKEY). |
| l | Limit - Room has a user limit set (anything above 100 users must be set at room creation). |
| m | Moderated - Users in the room can be speced , or set mode -v, and they cannot speak. |
| n | No External Messages - Only people that are actually in the room, can speak in the room (if -n, you can talk in the room without actually being there). |
| p | Private - Room is not shown on the room listings, and you can only find out the amount of people in the room and the name (can't be used with +h or +s). |
| r | Registered - Official MSN room, shows as having a butterfly on the room list. |
| s | Secret - Room is not shown on any sort of room listings (same as +h, can't be used with +h or +p). |
| t | Only Hosts Set Topic - Only a host, owner, or MSN official can change the room topic (if -t, any user can change the topic). |
| u | Knock - When someone can't get into the room for whatever reason, all hosts receives a message stating so (MSN Chat Control does not display the message). |
| w | No Whispers - Normal users cannot whisper non-hosts (note that this is a lowercase w). |
| W | No Guest Whispers - Guests cannot whisper non-hosts (note that this is an UPPERCASE W). |
| x | Auditorium Mode - Normal users cannot see each other in the room and can only see hosts, while hosts can see everyone. |
| User Modes |
| v | Voice - User can speak in a moderated (+m) room. |
| o | Host - User is a host in the room (brown hammer). |
| q | Owner - User is an owner in the room (gold hammer). |
| Self Modes |
| h | Host - Used to host/owner yourself in a room (MODE YourName +h Password) |
| i | Invisible - Your info cannot be seen unless a user is in the same room as you are |
Arcade