I found all the accredited registrars on Verisign website, crawled their whois with each company name and got the whois server.
Here's a list of all the whois servers for .com and .net in PHP array:
$servers = array(
"whois.godaddy.com",
"whois.networksolutions.com",
"whois.enom.com",
"whois.name.com",
"whois.tucows.com",
"whois.PublicDomainRegistry.com",
"whois.register.com",
"whois.wildwestdomains.com",
"whois.markmonitor.com",
"whois2.softlayer.com",
"whois2.domain.com",
"whois.zoomregistrar.com",
"whois.zonecasting.com",
"whois.zigzagnames.com",
"whois.yovole.com",
"whois.yournamemonkey.com",
"whois.yourjungle.com",
"whois.yourjungle.com",
"whois.yourdomainnameregistrar.com",
"whois.yourdomainking.com",
"whois.your-server.de",
"whois.youdamain.com",
"whois.yesnic.com",
"whois.yellowstart.com",
"whois.worthydomains.com",
"whois.worldbizdomains.com",
"whois.world4you.com",
"whois.willamettenames.com",
"whois.whatisyourdomain.com",
"whois.west263.com",
"whois.welcomedomain.com",
"whois.webzero.com",
"whois.websitesource.com",
"whois.website.ws",
"whois.webnic.cc",
"whois.webnames.ru",
"whois.webnames.ca",
"whois.webmasters.com",
"whois.webhosting24.com",
"whois.webbusiness.biz",
"whois.webair.com",
"whois.web4africa.net",
"whois.volusion.com",
"whois.vividdomains.com",
"whois.visualnames.com",
"whois.virtualregistrar.com",
"whois.vigson.com",
"whois.viennaweb.at",
"whois.viaduc.fr",
"whois.vertexnames.com",
"whois.vedacore.com",
"whois.unpower.com",
"whois.unifiedservers.com",
"whois.ultraregistrar.com",
"whois.ukrnames.com",
"whois.udomainname.com",
"whois.udomainname.com",
"whois.udamain.com",
"whois.udag.net",
"whois.twt.it",
"whois.turbosite.com.br",
"whois.ttpia.com",
"whois.tropicregistry.com",
"whois.traveldomainsincorporated.com",
"whois.transip.net",
"whois.trafficnames.net",
"whois.trafficmedia.com",
"whois.tradestarter.com",
"whois.tradenamed.com",
"whois.tradeindia.com",
"whois.tppinternet.com",
"whois.totalregistrations.com",
"whois.totallydomain.com",
"whois.topsystem.com",
"whois.toglodo.com",
"whois.todaynic.com",
"whois.titanichosting.com",
"whois.tigertech.net",
"whois.threadwise.com",
"whois.threadwatch.com",
"whois.threadwalker.com",
"whois.threadagent.com",
"whois.thirdfloordns.com",
"whois.theregistrarservice.com",
"whois.thenameco.com",
"whois.techtyrants.com",
"whois.tagidomains.com",
"whois.syra.com.au",
"whois.svenskadomaner.se",
"whois.supernameworld.com",
"whois.subreg.cz",
"whois.star-domain.jp",
"whois.sssasss.com",
"whois.ssandomain.com",
"whois.soyouwantadomain.com",
"whois.softlayer.com",
"whois.snoqulamiedomains.com",
"whois.snappyregistrar.com",
"whois.skykomishdomains.com",
"whois.sitefrenzy.com",
"whois.sipence.com",
"whois.silverbackdomains.com",
"whois.signdomains.com",
"whois.sicherregister.com",
"whois.sibername.com",
"whois.sfn.cn",
"whois.seymourdomains.com",
"whois.serverplan.com",
"whois.secura-gmbh.de",
"whois.searchnresq.com",
"whois.searchname.ca",
"whois.sdsns.com",
"whois.sbsnames.com",
"whois.savethename.com",
"whois.savemorenames.com",
"whois.santiamdomains.com",
"whois.sammamishdomains.com",
"whois.safenames.net",
"whois.rrpproxy.net",
"whois.rockenstein.de",
"whois.riktad.se",
"whois.ride-domain.com",
"whois.rethemhosting.net",
"whois.resellserv.com",
"whois.resellerid.com",
"whois.resellercamp.com",
"whois.registrygate.com",
"whois.registrationtek.com",
"whois.registrar.telekom.de",
"whois.registrar.eu",
"whois.registrar-info.eu",
"whois.registermatrix.com",
"whois.register4less.com",
"whois.register.it",
"whois.register.eu",
"whois.register.ca",
"whois.reg2c.com",
"whois.reg.ru",
"whois.reclaimdomains.com",
"whois.rebel.com",
"whois.rankusa.com",
"whois.rainydaydomains.com",
"whois.r01.ru",
"whois.puritynames.com",
"whois.purenic.com",
"whois.puredomain.com",
"whois.psi-usa.info",
"whois.protondomains.com",
"whois.pronamed.com",
"whois.profilebuilder.com",
"whois.prodomaines.com",
"whois.privatedomains.biz",
"whois.premiumregistrations.com",
"whois.powernamers.com",
"whois.powercarrier.com",
"whois.powerbrandsolutions.com",
"whois.postaldomains.com",
"whois.platinumregistrar.com",
"whois.planetdomain.com",
"whois.pheenix.com",
"whois.pearlnamingservice.com",
"whois.pdxprivatenames.com",
"whois.paycenter.com.cn",
"whois.pavietnam.vn",
"whois.pananames.com",
"whois.paknic.com",
"whois.pairnic.com",
"whois.pacnames.com",
"whois.ownregistrar.com",
"whois.ownidentity.com",
"whois.ourdomains.com",
"whois.oregonurls.com",
"whois.oregoneu.com",
"whois.oray.com",
"whois.openname.com",
"whois.onlinenic.com",
"whois.omnis.com",
"whois.oldworldaliases.com",
"whois.oldtowndomains.com",
"whois.octopusdomains.net",
"whois.notsofamousnames.com",
"whois.noticeddomains.com",
"whois.nordreg.com",
"whois.nominfinitum.com",
"whois.nominate.net",
"whois.nominalia.com",
"whois.nomer.com",
"whois.no-ip.com",
"whois.nictrade.se",
"whois.nicreg.com",
"whois.nic.ru",
"whois.newgreatdomains.com",
"whois.neudomain.com",
"whois.networksavior.com",
"whois.networking4all.com",
"whois.nettica.com",
"whois.netsavers.com",
"whois.netregistry.net",
"whois.netlogistics.com.au",
"whois.netjuggler.com",
"whois.netim.com",
"whois.netestate.com",
"whois.netdorm.com",
"whois.netbulk.com",
"whois.netart-registrar.com",
"whois.net4domains.com",
"whois.net-chinese.com.tw",
"whois.nerdnames.com",
"whois.neonic.com",
"whois.neen.it",
"whois.needservers.com",
"whois.nayana.com",
"whois.nawang.cn",
"whois.namware.com",
"whois.namevolcano.com",
"whois.namevault.com",
"whois.nameturn.com",
"whois.nametofame.com",
"whois.namethread.com",
"whois.nametell.com",
"whois.namesystem.com",
"whois.namestream.com",
"whois.namestrategies.com",
"whois.namesinmotion.com",
"whois.namesilo.com",
"whois.nameshere.com",
"whois.namesector.com",
"whois.namescout.com",
"whois.namescout.com",
"whois.namesbeyond.com",
"whois.namesay.com",
"whois.namesalacarte.com",
"whois.names4ever.com",
"whois.namerich.cn",
"whois.nameperfections.com",
"whois.namepanther.com",
"whois.namenelly.com",
"whois.namemax.cn",
"whois.nameling.com",
"whois.nameking.com",
"whois.namejolt.com",
"whois.namefull.com",
"whois.nameforward.com",
"whois.namefinger.com",
"whois.nameescape.com",
"whois.nameemperor.com",
"whois.namecroc.com",
"whois.namechild.com",
"whois.namecheap.com",
"whois.namebright.com",
"whois.namebrew.com",
"whois.namebake.com",
"whois.namearsenal.com",
"whois.mypreciousdomain.com",
"whois.myorderbox.com",
"whois.myorderbox.com",
"whois.myobnet.com",
"whois.mvpdomainnames.com",
"whois.moniker.com",
"whois.mobilenameservices.com",
"whois.misternic.com",
"whois.misk.com",
"whois.mijninternetoplossing.nl",
"whois.microbreweddomains.com",
"whois.meshdigital.com",
"whois.matbao.net",
"whois.masterofmydomains.net",
"whois.markbark.com",
"whois.maprilis.com.vn",
"whois.mailclub.net",
"whois.magicfriday.com",
"whois.lws.fr",
"whois.locaweb.com.br",
"whois.litedomains.com",
"whois.liquidnetlimited.com",
"whois.lexsynergy.com",
"whois.lemonregistry.com",
"whois.ledl.net",
"whois.lcn.com",
"whois.lakeodomains.com",
"whois.ladasdomains.com",
"whois.kuwaitnet.net",
"whois.kudo.com",
"whois.ksdom.kr",
"whois.komplex.net",
"whois.klaatudomains.com",
"whois.king-domains.com",
"whois.keyregistrar.com",
"whois.k8.com.br",
"whois.jungbo.net",
"whois.jprs.jp",
"whois.joker.com",
"whois.joinup.jp",
"whois.jetpackdomains.com",
"whois.itpan.com",
"whois.isregistrar.com",
"whois.isimtescil.net",
"whois.iserveyourdomain.com",
"whois.iregistry.com",
"whois.ireg.net",
"whois.ipxcess.com",
"whois.ipmirror.com",
"whois.intrustdomains.com",
"whois.internetworks.com",
"whois.internetters.co.uk",
"whois.internetdomainnameregistrar.org",
"whois.internet.bs",
"whois.interlakenames.com",
"whois.interdominios.com",
"whois.interdomain.net",
"whois.instinctsolutions.com",
"whois.instantnames.com",
"whois.insanenames.com",
"whois.initialesonline.net",
"whois.ininaf.com",
"whois.inic.ch",
"whois.indiatimes.com",
"whois.inames.co.kr",
"whois.imminentdomains.net",
"whois.imena.ua",
"whois.ilait.com",
"whois.iisp.com",
"whois.ihs.com.tr",
"whois.idindi.com",
"whois.idgenesis.com",
"whois.ibi.net",
"whois.iaregistry.com",
"whois.hyperstreet.com",
"whois.hupo.com",
"whois.http.net",
"whois.hotdomaintrade.com",
"whois.hostway.com",
"whois.hostingservicesinc.net",
"whois.hostinger.com",
"whois.hosting.kr",
"whois.hoapdi-inc.com",
"whois.hichina.com",
"whois.hectamedia.com",
"whois.heavydomains.net",
"whois.hawthornedomains.com",
"whois.haveaname.com",
"whois.gzidc.com",
"whois.guoxuwang.cn",
"whois.gungagalunga.biz",
"whois.groundinternet.com",
"whois.gradeadomainnames.com",
"whois.gozerdomains.com",
"whois.goserveyourdomain.com",
"whois.google.com",
"whois.gooddomainregistry.com",
"whois.gonbei.jp",
"whois.gomontenegrodomains.com",
"whois.gofullhouse.com",
"whois.gofrancedomains.com",
"whois.godomaingo.com",
"whois.gochinadomains.com",
"whois.gocanadadomains.com",
"whois.goaustraliadomains.com",
"whois.glis.in",
"whois.glamdomains.com",
"whois.gkg.net",
"whois.ghana.com",
"whois.getyername.com",
"whois.genious.net",
"whois.gatekeeperdomains.net",
"whois.gandi.net",
"whois.gamefornames.com",
"whois.gabia.com",
"whois.fushitarazu.com",
"whois.frontstreetdomains.com",
"whois.freshbreweddomains.com",
"whois.freeparking.co.uk",
"whois.flancrestdomains.com",
"whois.findyouaname.com",
"whois.findyouadomain.com",
"whois.finduaname.com",
"whois.findgooddomains.com",
"whois.fiducia.lv",
"whois.fenominal.com",
"whois.fabulous.com",
"whois.extrathreads.com",
"whois.extranetdeclientes.com",
"whois.extendnames.com",
"whois.experinom.com",
"whois.exai.com",
"whois.evonames.com",
"whois.everreadynames.com",
"whois.euturbo.com",
"whois.eurotrashnames.com",
"whois.europeanconnectiononline.com",
"whois.eurodns.com",
"whois.eunameflood.com",
"whois.epik.com",
"whois.entorno.es",
"whois.entertainmentnames.com",
"whois.enterprice.net",
"whois.enomx.com",
"whois.enomworld.com",
"whois.enomv.com",
"whois.enomtoo.com",
"whois.enomten.com",
"whois.enomnz.com",
"whois.enomgmpservices.com",
"whois.enomfor.com",
"whois.enomeu.com",
"whois.enomcorporate.com",
"whois.enombre.com",
"whois.enomate.com",
"whois.enoma1.com",
"whois.enom5.com",
"whois.enom469.com",
"whois.enom467.com",
"whois.enom463.com",
"whois.enom459.com",
"whois.enom457.com",
"whois.enom455.com",
"whois.enom453.com",
"whois.enom451.com",
"whois.enom449.com",
"whois.enom447.com",
"whois.enom445.com",
"whois.enom443.com",
"whois.enom441.com",
"whois.enom439.com",
"whois.enom437.com",
"whois.enom435.com",
"whois.enom433.com",
"whois.enom431.com",
"whois.enom429.com",
"whois.enom427.com",
"whois.enom425.com",
"whois.enom423.com",
"whois.enom421.com",
"whois.enom419.com",
"whois.enom417.com",
"whois.enom413.com",
"whois.enom411.com",
"whois.enom409.com",
"whois.enom407.com",
"whois.enom405.com",
"whois.enom403.com",
"whois.enom4.com",
"whois.enom399.com",
"whois.enom397.com",
"whois.enom395.com",
"whois.enom391.com",
"whois.enom389.com",
"whois.enom387.com",
"whois.enom381.com",
"whois.enom379.com",
"whois.enom377.com",
"whois.enom375.com",
"whois.enom373.com",
"whois.enom371.com",
"whois.enom3.com",
"whois.enom2.com",
"whois.enom1.com",
"whois.enetica.com.au",
"whois.encirca.com",
"whois.ename.com",
"whois.echodomain.com",
"whois.ebrandsecure.com",
"whois.easyspace.com",
"whois.eastnames.com",
"whois.eachnic.com",
"whois.eNom461.com",
"whois.eNom415.com",
"whois.eNom393.com",
"whois.eNom385.com",
"whois.eNom383.com",
"whois.dyndns.com",
"whois.dynanames.com",
"whois.dynamicdolphin.com",
"whois.dynadot5.com",
"whois.dynadot4.com",
"whois.dynadot3.com",
"whois.dynadot2.com",
"whois.dynadot1.com",
"whois.dynadot0.com",
"whois.dynadot.com",
"whois.duckbilleddomains.com",
"whois.dropoutlet.com",
"whois.dotroll.com",
"whois.dotnamed.com",
"whois.dotname.co.kr",
"whois.dotdomainsale.com",
"whois.dotarai.com",
"whois.dotalliance.com",
"whois.domus-llc.com",
"whois.domrobot.com",
"whois.domerati.com",
"whois.domdrill.com",
"whois.domainz.com",
"whois.domainyeti.com",
"whois.domainwards.com",
"whois.domaintimemachine.com",
"whois.domaintact.com",
"whois.domainsurgeon.com",
"whois.domainstreetdirect.com",
"whois.domainsrs.com",
"whois.domainsprouts.com",
"whois.domainsovereigns.com",
"whois.domainsoverboard.com",
"whois.domainsouffle.com",
"whois.domainsonly.com",
"whois.domainsofvalue.com",
"whois.domainsoftheworld.net",
"whois.domainsoftheday.net",
"whois.domainsofcourse.com",
"whois.domainsinthebag.com",
"whois.domainshype.com",
"whois.domainsareforever.net",
"whois.domainsalsa.com",
"whois.domainsails.net",
"whois.domains.domreg.lt",
"whois.domains.co.za",
"whois.domainroyale.com",
"whois.domainregi.com",
"whois.domainraker.net",
"whois.domainprocessor.com",
"whois.domainprime.com",
"whois.domainpicking.com",
"whois.domainpeople.com",
"whois.domainparkblock.com",
"whois.domainnovations.com",
"whois.domainnameshop.com",
"whois.domainname.com",
"whois.domainmonster.com",
"whois.domainmap.com",
"whois.domainlocal.com",
"whois.domainladder.com",
"whois.domainjungle.net",
"whois.domaininthehole.com",
"whois.domaininthebasket.com",
"whois.domainhysteria.com",
"whois.domainhood.com",
"whois.domainhawks.net",
"whois.domaingetter.com",
"whois.domaingazelle.com",
"whois.domainfalcon.com",
"whois.domainextreme.com",
"whois.domaindiscover.com",
"whois.domaindelights.com",
"whois.domaincritics.com",
"whois.domaincreek.com",
"whois.domaincraze.com",
"whois.domaincontext.com",
"whois.domaincomesaround.com",
"whois.domainclub.com",
"whois.domainclip.com",
"whois.domaincentre.ca",
"whois.domaincapitan.com",
"whois.domainarmada.com",
"whois.domainamania.com",
"whois.domainallies.com",
"whois.domainahead.com",
"whois.domainagent.co.nz",
"whois.domain2.com",
"whois.domain.com",
"whois.documentdata.li",
"whois.do-reg.jp",
"whois.dns.com.cn",
"whois.dm3networks.com",
"whois.division120.com",
"whois.distributeit.com.au",
"whois.discountdomainsuk.com",
"whois.discount-domain.com",
"whois.directnic.com",
"whois.dfordomains.com",
"whois.desertdevil.com",
"whois.deschutesdomains.com",
"whois.demys.com",
"whois.dattatec.com",
"whois.dandomain.dk",
"whois.dagnabit.biz",
"whois.curiousnet.com",
"whois.crystalcoal.com",
"whois.cronon.net",
"whois.crispnames.com",
"whois.cps-datensysteme.de",
"whois.corporatedomains.com",
"whois.corenic.net",
"whois.coolocean.com",
"whois.compuglobalhypermega.com",
"whois.communigal.net",
"whois.commerceisland.com",
"whois.comfydomains.com",
"whois.columbianames.com",
"whois.cnolnic.com",
"whois.cndns.com",
"whois.cn.hooyoo.com",
"whois.clouddomainregistry.com",
"whois.cheapies.com",
"whois.cdmon.com",
"whois.ccireg.com",
"whois.ccdomain.co.kr",
"whois.burnsidedomains.com",
"whois.bullrundomains.com",
"whois.bottledomains.com",
"whois.boterosolutions.net",
"whois.bookmyname.com",
"whois.bluerazor.com",
"whois.bluefractal.com",
"whois.blockhost.com",
"whois.blisternet.net",
"whois.blastdomains.com",
"whois.blacknight.com",
"whois.bizcn.com",
"whois.binero.se",
"whois.biglizarddomains.com",
"whois.bighouseservices.com",
"whois.bigdomainshop.com",
"whois.betterthanaveragedomains.com",
"whois.belmontdomains.com",
"whois.beartrapdomains.com",
"whois.batdomains.com",
"whois.basicfusion.com",
"whois.baronofdomains.com",
"whois.badger.com",
"whois.backslapdomains.com",
"whois.azprivatez.com",
"whois.azdomainz.com",
"whois.az.pl",
"whois.aviddomain.com",
"whois.ausregistryinternational.com",
"whois.atozdomainsmarket.com",
"whois.atomicdomainnames.com",
"whois.atlanticfriendnames.com",
"whois.astutium.com",
"whois.assorted.com",
"whois.asiaregister.com",
"whois.asiadomains.biz",
"whois.asadal.com",
"whois.aruba.it",
"whois.arcticnames.com",
"whois.arabinternetnames.com",
"whois.antagus.de",
"whois.anchovy.com",
"whois.alpinedomains.com",
"whois.allworldnames.com",
"whois.allglobalnames.com",
"whois.allearthdomains.com",
"whois.alfena.com",
"whois.aitdomains.com",
"whois.afternic.com",
"whois.afterdarkdomainsincorporated.com",
"whois.afriregister.com",
"whois.aerotek.com.tr",
"whois.advancedregistrar.com",
"whois.adomainofyourown.com",
"whois.activeregistrar.com",
"whois.active24.com",
"whois.acquirednames.com",
"whois.accentdomains.com",
"whois.above.com",
"whois.aboutdomainsolutions.com",
"whois.PresidentialDomains.com",
"whois.NameWeb.biz",
"whois.LTNIC.com",
"whois.72dns.com",
"whois.625domains.com",
"whois.55hl.com",
"whois.51hkidc.com",
"whois.35.com",
"whois.2imagen.net",
"whois.22.cn",
"whois.1isi.com",
"whois.1hostkorea.com",
"whois.1hostjapan.com",
"whois.1hostgermany.com",
"whois.1hostchina.com",
"whois.1hostcanada.com",
"whois.1hostaustralia.com",
"whois.123-reg.co.uk",
"whois.101domain.com",
"whois.0101domain.com",
"whois.007names.com",
"rcube.ipmirror.com/rblWhois.do",
"nswhois.domainregistry.com",
"kheweul.org",
"grs-whois.hichina.com",
"comnet-whois.humeia.com",
"Whois.gabia.com",
"Whois.bigrock.com",
"Whois.bigrock.com",
"Whois.Registrar.Amazon.com",
);
Made for my startup company WhoAPI.com.
