There are 465 known IRC networks listed below...
  
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      | 1 | 
      123freechat.com     | 
      | 2 | 
      2600net     | 
      | 4 | 
      420-Hightimes     | 
      | 5 | 
      5ch     | 
      | A | 
      aapple.no, Abandoned-IRC, Abjects, AccessIRC, ACN, After-All, AfterNET, AfterX, AIN, Aitvaras, AlbaniaIRC, Albirc, All4masti, AllNetwork, AllNightCafe, AlphaChat, AlphaIRC, AlreadyH4ckMe, AmicaChat, AmistadChat, Andromeda.Fr, AnimeFriends, Aniverse, AnonNet, AnonOps, AnthroChat, Anynet, Apropo, ApropoRomania, asylum, AsylumNet, Atrum, AureAWorld, AustNet, AyoChat, Azzurra     | 
      | B | 
      B2IRC, BanglaCafe, Bastard-IRC, BGirc.com, Bigfurs, BitreichIRC, BizdeSohbet, Black-Cell.net, Blafasel, Blitzed, BOLChat, Bondage.International, BoredIRC, BR-online, BrasIRC, BrasIRC.ORG, BRASnet, Brazink, BSDnet, Buzznet, ByNets, byxnet     | 
      | C | 
      C2H5OH, Caelestia, CakeForceUK, Canternet, Chaat, ChamberIRC, Chaoz-IRC, Chat, Chat-Solutions, Chat.com.tr, Chat4All.org, ChatArea, Chaterz.nl, Chating.ID, ChatIRC.net, ChatJunkies, ChatLife, ChatLounge, ChatNPlay, Chatopia, ChatPlezier, ChatSansar, ChatSpike, Chatters, Chattersnet, Chattersweb, Chattersworld, Chatteurs.fr, ChatToIRC, Chatzona, ChillNet, CnCIRC, Coders-IRC, Cognet, CollectiveIRC, Communiti-Chat, Coolsmile.net, CoreIRC, Crippler, CrystalIRC, Cuff-Link, Cuplu, CyberArmy, CyberIRC, CyGen     | 
      | D | 
      d3x, D4RCnet, DaIRC, DALnet, DALNet.RU, DareNET, Dark-Tou-Net, darkfasel.net, DarkMyst, darkscience, DarkVoltage, DarkWorld, deepspace.org, degunino.net, DejaToons, DesireNet, Deutscher-Chat.de, DigitalIRC, Discut.Biz, Do-Dear.com, Dogm-Network, DorksNet, dreams-fr, DrLnet, DynastyNet, dyne.org     | 
      | E | 
      Eagles-myIRC, Echo34, ECNet, EFnet, ElectroCode, EnterTheGame, Entrechat, EntropyNet, EpiKnet, EsperNet, etree, euIRC, EuropeIRC, EuropNet, evilcorp, EvilNET, EvoChat, Evolu.NET, ExodusIRC, eXolia, ExplosionIRC     | 
      | F | 
      FDFnet, FEFNet, FlexNet, ForestNet, ForumCerdas, freenode, FreeUniBG, FriendsIRC, friendszone, FurNet, FyreChat     | 
      | G | 
      GameSurge, Gedik.NET, GeekNode, GeekShed, Genscripts, German-Elite, Geveze, GhostNet, GhostsIRC, gigachat, GigaIRC, GIMPnet, Global-Irc.Eu, GlobalGamers, GlobalIRC.it, Gotham, GreekChat, GreekIRC, Griefplay, GTANet     | 
      | H | 
      H4x0red, hackint, HanIRC, hashbang.sh, hashmark.net, Hellcat, homo.net, Hub4Ever.Org, HybridIRC     | 
      | I | 
      IceStarIRC, iChat, ICQ-Chat, IdleChat, IGradio, India Chat, Inframonde, Inside-IRC, interlinked.me, IRC-Ban.de, IRC-Hispano, IRC-Mania, IRC-Nerds, IRC.tl, IRC2, IRC4Fun, IrcCity, IRCCloud, IRCDrama, IRCFreakz, IRCGate.it, IRCHighWay, iRCLiNE, IRCLink, IRCLuxe.RU, IRCnet, IRCNet.ru, IRCnet2, IRCNow, IRCserveR_Italia, IRCsource, IRCstorm, IRCtoo, IRCube, IrcWorld, ircx.net.pl, IRDSI, Italian-Amici, Ivrit, iZ-smart.net     | 
      | J | 
      Jeko, Jmeeting, JouluNet, juggler.jp, JustTrance     | 
      | K | 
      Kahkaha.Gen.Tr, Kalbim.Net, KampungChat, Kelebek, KewlFun, Keyboard-Failure, KnightIRC, Koach.Com, KonnectChatIRC, KreyNet     | 
      | L | 
      Langochat.net, LewdChat, Libera.Chat, LibertaCasa, LibraIRC, LichtSnel, LinkNet, LizardIRC, LostIRC, lowendirc.com, Luatic, LUG, LUGS, LunarIRC     | 
      | M | 
      MaddShark, MadIRC, MagicStar, MagNET, Mavra.Net, MeFalcon, MeGa-Chat, Mibbit, MindForge, mircphantom.net, MIXXnet, Mobilci.Net, Morphie, Mozilla, MyCooldude     | 
      | N | 
      n00bstories, NationCHAT, Necron, NekoNet, Net-Tchat, Netgoth, Nether.RIP, NetIRC, Netrusk, newchat.gr, NewNet, ngpre, NightStar.Net, NordicIRC, Noxether     | 
      | O | 
      Oceanius, OFTC, OltreIrc, Omerta, Omninet, Omofil, OnlineGamesNet, onzin.org, OpenJoke, OperaNet, OptiLan, Orixon, oshaberi, Otaku-IRC, OtakuboX, ouchnet, out-dated.net, OzOrg     | 
      | P | 
      P2P-NET, P2PChat, paranode.net, PC-Logix, PenguinFriends, PhatNET, Pilgerer, pinoyIRC, PIRC.pl, pissnet, PowaNet, Powers.cl, PriyoBD, Provisionweb, PSIGenix, PTirc, PTnet, PurpleSurge     | 
      | Q | 
      QuakeNet, QuickFox     | 
      | R | 
      RadioClick, RagingFist.net, RealIRC, Recycled-IRC, RedeSul, RelaxedIRC, RelicNet, RenCorner, ReplIRC_Solanum, RetroNode, RezoSup, Ring.of.Lightning, RisposteInformatiche, Rizon, RoIRCop, RomaniaChat, RootWorlD, rs2i, RusNet     | 
      | S | 
      SA-IRC, SACNR, Saurik, SBSeeds, ScaryNet, SceneCritique, SceneP2P, ScoutLink, Seraphim, Serenity-IRC, Serverfreakz, ShadowFire, ShadowWorld.Net, ShakeIT, Shelltalk, SimosNap, SiSrv, SkyChatz, SkyIrc, SKYROCK, Slacknet, SlashNET, SloCHAT, Smurfnet, Snoonet, Sohbet.net, SohbetBurada, SolarNet, SomeNet, SorceryNet, Soyjak-Party, soyle.net, SoylentNews, SpigotMC, SpotChat, ST-City, StarChat, StarLink.Org, Station51.net, StayNet, StormBit, Striked, StyxNet, Subluminal, SurrealChat.net, SwiftIRC, swissIRC.net, Synchronet, synIRC     | 
      | T | 
      Taphouse, tawx, tChat, tChatIRC, TeapotChat, TechNet, techrights, Techtronix, Teepi, Teranova, TerraChat, TheAirlock, TheBDSMChat, TheOneRing, tilde.chat, tm-irc, TransAdvice, TrendSohbet.Com, TripSit, TRSohbet, TrYPNET, Tweakers, TwistedNet     | 
      | U | 
      UFnet, UmbrellaNet, UnderMind, Undernet, UniBG, UnifiedChat, UnitedChat, UniversalNet, UniversoChat, UplinkIRC, UtoNet     | 
      | V | 
      Viral, vIRCio, VirtuaLife, VoodooNet     | 
      | W | 
      w3.org, WebChat, WebIRC, WeNet, WetFish, WhatNET, WixChat, WNet, WorldAssault, WorldIRC, Worldnet, Wotnet, WugNet, WUP     | 
      | X | 
      XChannel, Xerologic, XeroMem, Xertion, Xevion.Net, XxXChatters     | 
      | Z | 
      ZAIRC, Zandronum, Zemra, ZEnet, zeolia, ZeroNode, Zik.chat, Zoite       |