Here a hughe List of Whois Servers ( many of them are also registrars ... )

grs.hichina.com/
nswhois.domainregistry.com/
rs.domainbank.net/
rs.domainpro.com/
whois.000domains.com/
whois.007names.com/
whois.1-877namebid.com/
whois.1accredited.com/
whois.1dni.com/
whois.1stdomain.net/
whois.4domains.com/
whois.123registration.com/
whois.8068.com/
whois.OnlineNIC.com/
whois.aaaq.com/
whois.aceofdomains.com/
whois.activeisp.com/
whois.addresscreation.com/
whois.advantage-interactive.com/
whois.afforda.com/
whois.aitdomains.com/
whois.alldomains.com/
whois.allglobalnames.com/
whois.alohanic.com/
whois.alohawebservices.net/
whois.amountaindomains.com/
whois.annulet.com/
whois.answerable.com/
whois.aodomains.com/
whois.apisrs.com/
whois.ar.com/
whois.asadal.com/
whois.ascio.com/
whois.atcomtechnology.com/
whois.awbtrading.com/
whois.awregistry.net/
whois.bestregistrar.com/
whois.biditwinit.com/
whois.bizcn.com/
whois.blisternet.net/
whois.bluerazor.com/
whois.bookmyname.com/
whois.bulkregister.com/
whois.catalog.com/
whois.centralregistrar.com/
whois.coloradonamesdomains.com/
whois.comitnet.com/
whois.communigal.net/
whois.compana.com/
whois.corenic.net/
whois.corporatedomains.com/
whois.cvo.ca/
whois.cypack.com/
whois.dagnabit.biz/
whois.directi.com/
whois.directnic.com/
whois.discount-domain.com/
whois.dns-net.de/
whois.dns.com.cn/
whois.do-reg.jp/
whois.dodora.net/
whois.domainca.com/
whois.domaincentre.ca/
whois.domaincontender.com/
whois.domaindiscover.com/
whois.domaindomain.com/
whois.domaininfo.com/
whois.domainit.com/
whois.domainmarketplace.ca/
whois.domainmonkeys.com/
whois.domainname.com/
whois.domainnamesales.com/
whois.domainnovations.com/
whois.domainpeople.com/
whois.domainplaza.ca/
whois.domainprocessor.com/
whois.domains2be.ca/
whois.domainscape.ca/
whois.domainscostless.ca/
whois.domainsite.com/
whois.domainsystems.com/
whois.domainthenet.com/
whois.domainz.com/
whois.domainzoo.com/
whois.domus-llc.com/
whois.doregi.com/
whois.dotearth.com/
whois.dotforce.com/
whois.dotregistrar.com/
whois.dotster.com/
whois.dreamhost.com/
whois.dropoutlet.com/
whois.dynadot.com/
whois.e-names.org/
whois.eastcom.com/
whois.easydns.com/
whois.easyspace.com/
whois.ebrandsecure.com/
whois.emilynamesdomains.com/
whois.enameco.com/
whois.encirca.biz/
whois.enetica.com.au/
whois.enetregistry.net/
whois.enom.com/
whois.enombre.com/
whois.enterprice.net/
whois.esite.com/
whois.esoftwiz.com/
whois.expertsrs.com/
whois.extrathreads.com/
whois.extremedomains.ca/
whois.fabulous.com/
whois.fiducia.lv/
whois.fireman.org/
whois.fm-net.ne.jp/
whois.fushitarazu.com/
whois.g.ausregistry.net/
whois.gabia.com/
whois.gandi.net/
whois.getsld.com/
whois.getyername.com/
whois.gkg.net/
whois.globedom.com/
whois.godaddy.com/
whois.gotnames.ca/
whois.gungagalunga.biz/
whois.hjlinnen.com/
whois.i-names.co.kr/
whois.iana.org/
whois.iaregistry.com/
whois.ibi.net/
whois.idindi.com/
whois.idregister.com/
whois.inames.co.kr/
whois.inic.ch/
whois.ininaf.com/
whois.initialesonline.net/
whois.inname.net/
whois.interaccess.com/
whois.interdomain.net/
whois.internetters.co.uk/
whois.iregister.com/
whois.itsyourdomain.com/
whois.jjhinvestments.com/
whois.joker.com/
whois.ladasdomains.com/
whois.leadnetworks.com/
whois.legrandnom.com/
whois.libris.com/
whois.markbark.com/
whois.markmonitor.com/
whois.melbourneit.com/
whois.mobilenameservices.com/
whois.moniker.com/
whois.mynamenow.com/
whois.name-services.com/
whois.name.com/
whois.name2host.com/
whois.name7.com/
whois.namebay.com/
whois.nameengine.com/
whois.namefrog.com/
whois.namefull.com/
whois.nameintel.com/
whois.namejuice.com/
whois.nameking.com/
whois.namenelly.com/
whois.names4ever.com/
whois.namesbeyond.com/
whois.namescout.com/
whois.namesdirect.com/
whois.namesecure.com/
whois.nameshare.com/
whois.namestream.com/
whois.namesystem.com/
whois.namethread.com/
whois.nameview.com/
whois.namezero.com/
whois.neonic.com/
whois.nerdnames.com/
whois.netnames.com/
whois.networksolutions.com/
whois.newdentity.com/
whois.nicline.com/
whois.nitin.com/
whois.nominalia.com/
whois.nominate.net/
whois.nominfinitum.com/
whois.nordnet.net/
whois.oleane.net/
whois.omnis.com/
whois.opensrs.net/
whois.ovh.com/
whois.pairnic.com/
whois.parava.net/
whois.pasia.com/
whois.paycenter.com.cn/
whois.personalnames.com/
whois.planetdomain.com/
whois.plisk.com/
whois.primedomain.ca/
whois.psi-usa.info/
whois.psi.jp/
whois.rebel.com/
whois.register.com/
whois.register.it/
whois.registernames.com/
whois.registersite.com/
whois.registrar.aol.com/
whois.registrar.telekom.de/
whois.registrationtek.com/
whois.rgnames.com/
whois.rjgventures.com/
whois.rockenstein.de/
whois.roka.net/
whois.rrpproxy.net/
whois.safenames.net/
whois.schlund.de/
whois.schlund.info/
whois.secura-gmbh.de/
whois.shop4domain.com/
whois.sicherregister.com/
whois.sicherregister.de/
whois.signaturedomains.com/
whois.signdomains.com/
whois.sipence.com/
whois.slimnames.com/
whois.srspartner.com/
whois.srsplus.com/
whois.sssasss.com/
whois.stargateinc.com/
whois.tagidomains.com/
whois.tahoedomains.com/
whois.thatdarnname.com/
whois.thegreatdomain.ca/
whois.tmagnic.net/
whois.todaynic.com/
whois.totalnic.net/
whois.totalregistrations.com/
whois.transecute.com/
whois.ttpia.com/
whois.usawebhost.com/
whois.valleyapples.com/
whois.vedacore.com/
whois.vi.net/
whois.vividdomains.com/
whois.walelabrook.com/
whois.web.com/
whois.webmasters.com/
whois.webnic.cc/
whois.wgbregistry.com/
whois.whoistoolbar.com/
whois.wildwestdomains.com/
whois.worldnames.ca/
whois.yesnic.com/
www.whois.namezero.com/