http://www.debian.org/support#irc - On-line Real Time Help Using IRC
Official Debian IRC channels
The hostname irc.debian.org is an alias for irc.oftc.net. That means that the official Debian IRC channels are on the OFTC IRC network:
#debian: Meant for Debian users support. Any questions related to using Debian are welcome. See how to get useful help on IRC.
#debian-boot: Meant for discussing the Debian installer (and, occasionally, supporting users of it).
#debian-br: Por favor, use #debian-br para ajuda em português.
#debian-bugs: Meant for discussing how to fix bugs. This channel is not for reporting bugs.
#debian-cd: Discussion about development of the debian-cd package and the production and distribution of official CD and DVD images.
#debian-devel: Meant for discussions about the development of Debian. This channel is not a support channel. Asking support questions here is inappropriate.
#debian.de: German-language user channel, also developers.
#debian-devel.de: German-language developer channel. Used when #debian.de is busy. Not a support channel.
#debian-es: Hispanohablantes: Por favor usen #debian-es, alli obtendran mas ayuda.
#debian-fr: Les personnes qui parlent francais mais peu ou pas anglais et qui ont besoin d'aide avec Debian peuvent demander sur #debian-fr.
#debian-games: All about Games and Debian
#debian-kde: Support channel for KDE in Debian.
#debian-mentors: Meant for support for beginning developers. See also the debian-mentors mailing list.
#debian-newmaint: New Maintainer Process - https://nm.debian.org/.
#debian-nl: Voor ondersteuning in het Nederlands.
#debian-ocaml: Packaging and development of OCaml-related stuff in Debian
#debian-qa: Debian Quality Assurance - http://qa.debian.org/.
#debian-release: Debian Release Management - http://release.debian.org ; NOT a support channel, only release related discussion here
#debian-uk: Debian in the UK (United Kingdom, not Ukraine); NOT a support channel.
#debian-vim: Packaging and development of Vim-related stuff in Debian.
#debian channels have a /Netiquette.
Other Debian related IRC channels
#debian-backports on OFTC: Related to Debian Backports. The backports packages repository is not (yet) officially part of the Debian project.
Links
IRC servers: http://www.mirc.com/servers.html and http://www.irc-hispano.org