Groups

Welcome Burst

These numerics are sent after a user successfully connects to the network.

001 RPL_WELCOME

Introduces users to the network
002 RPL_YOURHOST

Tells users about the server they’re connecting to
003 RPL_CREATED

Tells users when the server was started
004 RPL_MYINFO

Gives users mode letter information
005 RPL_ISUPPORT
372 RPL_MOTD

Shows users the server’s Message of the Day
375 RPL_MOTDSTART

Introduces the server’s Message of the Day
376 RPL_ENDOFMOTD

Finishes the server’s Message of the Day
422 ERR_NOMOTD

Indicates that no Message of the Day exists

Message of the Day

These numerics send the current Message of the Day (MOTD) to users.

372 RPL_MOTD

Shows users the server’s Message of the Day
375 RPL_MOTDSTART

Introduces the server’s Message of the Day
376 RPL_ENDOFMOTD

Finishes the server’s Message of the Day
422 ERR_NOMOTD

Indicates that no Message of the Day exists

Operator

These numerics are sent specifically to IRC operators and those opering-up.

381 RPL_YOUREOPER

Lets users know they have opered-up successfully
481 ERR_NOPRIVILEGES

Indicates an attempted action can only be performed by opers
491 ERR_NOOPERHOST

Indicates an oper-up attempt was unsuccessful
723 ERR_NOPRIVS

Indicates an attempted action can only be performed by specific opers

Whois

These numerics are sent in response to the WHOIS and/or WHOWAS commands.

276 RPL_WHOISCERTFP

Gives the user’s TLS client certificate fingerprint
311 RPL_WHOISUSER

Shows the nick, username, hostname, and realname of the given user