The most members online in one day was 1,542, 23rd January 2012.
0baojame, 0x0539, 1977-C8, 1AU, 4lefts, 661-pete, 7oddy, 8007H, 8633Brown, 8kids, a10ken, Aanubis, aball28, abradabaugraph, AceShaw, acey, AdeyG, Adrian, Adrian Condon, Advertise, Adz, Aenima, Ags, aiyowei, Alan, Alan_B, ALecras234, Ally8446, Alma, ALTayer, altec, amt, amyscott, Anddy Diablo, andrew s, Andrew*, Andrew-77, andrew63, AndyC, AndyH, AndyUK, Andy_E, angusb1, Anne S, ant, Anweniel, appalachik, assasincz, Astro-Nova, astromerlin, Astroscot2, astrostu, Astrosurf, Astro_Baby, atharh, Atlas, Auntystatic, auspom, aussi skywatcher, Avdhoeven, avoneschen, baallbackwayl, badgerchap, Baffa, barkis, Bart, Bat502, beamish, beatlejuice, Belcher, Beulah, bhuston, Big Jim Slade, bigal1, BigDeadPixel, Bigeye, BigMakStutov, BillH, billhinge, Bingo, biopic, bish, biz, Black Knight, Blackbrazen, blkdimnd, BlueAstra, Bluemoonsean, boabsta, Bob Andersson, bobhughes, Braxton, Brent, brianw1, brucen, Bryan196, c3po, c87, Cableguy, callump, Canholder, Carl M, Casperovic, Cath, ccbmedic, cdan, CeeDee, Celtic Deacon, CFC, cgarry, CGolder, Charlie_132, ched, chrisbauernl, chrisshillito, ChrisThePuma, chunky, cindythompson, CKemu, Clancy Lane, cloudbuster, Codmate, Cornelius Varley, cotterless45, coulthamst, coxy63, crazyjedi, Crispy, cspindley, Cubemaster, Damo636, damp owl, Daniel-K, darc, dariot, dav1d, Dave, Dave Dubya, Dave Moulton, Dave Smith, Dave-Brooks, Dave-Ryan, dave1978, DaveJFT, davepfc69, DaveT, DavidValentine, David_The_Bears_Fan, Dawson1, daz395, DazC, Dazzyd, Dean, delilahtwinkle, Demon Barber, derrickf, Dieseltijger, Digby, Digz, dmahon, DN18, DOBBY, Domis, doseri, Double Kick Drum, Doug, drdavekaplan, Drigien, Dunkster, durr, dweller25, dwr51055, Earl, earth titan, Eastridge, ebdtebowsher, eddy, eiglos, Episkey, Euan, euphony, Ewan, eyepod, Fandango, Farooq, faulksy, feac, Ferox, feydakin77, Fish, Fish-Man, Flea77, FLO, Florentin, Frank the Troll, FraserClarke, freeflyjay, frewi808, gajjer, garethmob, GazK, gazmass, George Jones, Geys1987, gfletcher, ggreene1, Gina, Glen, glowjet, gost, Gradie, GrahamS, GrantR, grchif, greenninja, Gregski, grey, Grinde, groutledge, Grunthos, gswigswigs, Gunnar, gurneyfan67, harriri2000, harry page, hayju01, He who snores, Healthcare, Helen, henchelmajo, herbfinder, hgrh42f51, Hitesh, Hobbes, hoggi, Hollywood, Hugechris, Hungovergraham, ianaiken, Ibbo !, ibraidwo, icewalking, Ifmfo, iglusignanzach, ikorodu, insomnia, Islander, ismangil, Itabot, iwatkins, jabberwocky, jabez, Jake Bullit, James, JamesF, JamesM, jamespels, Jamie, Jammy, JAO, Jason D, jason.p, jason32, JayMax, Jaywillis78, Jeff greer, jeremy1, Jessun, jflowers, jgs001, Jiggy 67, Jim-a, jimmyjamjoejoe, Jim_M, Jinx, jlgrehtj45, JM2K, jnc71106, JoelH, John, johnb, Johnboy, JohnC64, johncbradley1, johninderby, johnrt, jonbarr87, JonH, jonnybradford, JonnyK, jsigone, JulianO, juliosky, just looking, Kai, Katie, Kbramley, keef, keithatrochdale, kenmyers, KerryAnn23, Kevin C, kharga, kiffy, kilty74, King, kingboya, klytus, knobby, Kokatha man, Kolloth, Komet, Kung-Fu_Kills, kustard, L8-Nite, Lars, laser_jock99, Lee85, LeeB, leelee970, Lensman, lesbelcher, lguise, libraryman, lionel, littlebeagle, Loki Calavera, Lorne, Lowenbrau, lshu, lucho, lucjam, lukebl, LukeSuppalot, Macavity, MadAlbert, magic612, Mahlew, MALIENGLEZ, mallorcasaint, manofscience, Mansnake, mario11, Mark1970Vintage, Mark72, MarkC, markryan, MarksCPC, Markus531, marshy123, mart rich, MartianSunset, martin20, martin_h, Matt I, Matt Scunthorpe, Matthew, matty4unet, mchiv80159, Mcphisto, mdhardy01, melsky, Merlin66, metaledkane, mftoet, mgirdwood, michael.h.f.wilkinson, michigander, michigoose, MickD, mickyblueyes, mightymonoped, Mik3, Mike Hawtin, Mike73, MikeD, mikehab, MikeP, MikeWilson, mindburner, Mister E, MJWales, Monki, Monty, Moonshane, moriniboy, movieman1866, Mr Flibble, Mr Moff, Mr TamiyaCowboy, mrmind1989, MrSpoon, murgen, m_j_lyons, ncjunk, neil phillips, Nereid3, Nevy, newarcher, newman, ngc457, NickK, NickRose2006, nicnac, nightfisher, Nillchill, noggyed, noienowregi, Novarius, ObscuredbyClouds, Odd Thomas, olander08, oldgit, OldWolf, Olek110, ollypenrice, Olorin, oneykondoskimb, Orion_the_Hunter, ottoman, oxhqlottyvn, Oxize, Pacheco, pajr777, palebluedot, Parallax, paul mc c, Paul81, Paulb3098, paulhutch, PaulHutchinson, Pauly, Paxo, pcardinal42, pel, perfrej, perkil8r, Pete0099, Peter Drew, peterbolson, petermarknimmo, petey, pete_gamby, pete_l, pgwenlan, Phaser6, phillc, philthy, Photonist, Pibbles, pilkinn, Pitsmoor Col, pixueto, Plantins, pleibowit, Polaris B, ponytale, Prador, Probablynot, Psychobilly, PunkJay, p_pathak5, qiangui430, Qualia, Quatermass, r1chd, r3i, RAC, Radhinio, rainbow, rainguy, Rakanishu, Ransu, Rattler, rawhead, Realt, reddoss, redfox1971, Reggie, rfdorfkipb, Richard C, richarddownunder, Richardisgreat, RichieBoyUk, riklaunim, RikM, Ringrocket, ringz, riverer, rjsc2001, Rob L, robbie c, RobH, robster, roby, RogerTheDodger, Roger_Laureys, rokkerz, Ronnie67, rory, rowan46, rpmiller78, rrosinha, rtnorthmens, runoffshed, russ.will, Russe, russellhq, Rusty Strings, Rwetherell, rwg, rwilkey, Saata, saberonyx, sallystar, Sam, SamAndrew, sammerry, saturn, saturn5, sausages, Scarlet, scoob-1979, ScoobyStoo, Seafury, Seme, sgazer, shaunster, Shazam, ShineOn, Si Rollett, SilverSeadog, Simi, Simms, sinky, SionR25, siovene, skybadger, Skybrowser, skygazer, SkyJamie, skyquest1028, skywatcher200, smeech, smunns, sologuitarist61, southernman, Sp@ce_d, Space Cowboy, Space Dragon, spaceboy, spider72, spike51, Spikey, SplintUK, SpookyKatt, squashnut72, squeaky, Stagman, stair, stampedingturtle, Starflyer, starfox, Stargazer Jack, Stargazing_Cliff, Starlight 1, starnut, StarSupernova, steelfixer, steelyglint, Stephen, steppenwolf, stev74, Steve, Steve Ward, SteveInNZ, stevetynant, stonemonkeylives, StuW, Stu_2011, sulaco, sunshine185, swamp thing, symesie04, Takahashi, TakMan, Taliesin, tbird, Technobill, teleaddict, terranien, terrym2002uk, tetenterre, The Sailor, The Stoat, themos, thenews24, Third rock, Tiberius, Tiki, tim r, tims, Timshortman, Tinker1947, Tizer, tjensen, tjr, Toadjuggler, todd8137, tollytastic1, Tom OD, tombulgin, tomlines, TonyM, Treeden, TRNunes, ts135, TycMozo, Tyr, TziuRiky, ubdhubinstan, UHF, Uhwaz, umadog, Uranium235, username, Vasco Santos, vdb, veesix, vince 66, Vince1963, Virtual Cold, Voongy, wackyscot, WakeyTiger, WayBig, Whistlebare, Widefield, Woody, wrinkly, wylam, wyx, x-f, yesyes, Yimini, ykket, Yoddha, Yosser70, Zaine UK, zakkhogan, Zaphod360, zcapp96, zenofrag, Zewrak

turk123 (60), Melissa517 (52), adt175 (45), hawk_eye1975, Ryno (17)