Robtex

Up: 64.21.128.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 64.21.128.0/19
Down right: 64.21.160.0/19
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.21.128.100	A+PTR	nadns01.8msweb.com
64.21.128.100	A	nalndns1.800forallcampaigns.com
64.21.128.100	A	nalndns1.csfcorp.com
64.21.128.101	PTR	nalnmail1.csfcorp.com
64.21.128.107	PTR	mail2.mx.csfcorp.com
64.21.129.32	A	mly9.profilespartner.com
64.21.129.33	A	mly10.profilespartner.com
64.21.129.34	A	mly11.profilespartner.com
64.21.129.35	A	mly12.profilespartner.com
64.21.129.136	A	ns2.fidohost.net
64.21.129.137	A	ns1.fidohost.net
64.21.129.154	A	saundersandwalker.com
64.21.129.160	A	qm160.profilespartner.com
64.21.130.2	A	ns1.insightbenefit.com
64.21.130.3	PTR	web.smtp.insightbenefit.com
64.21.130.3	A	ns2.insightbenefit.com
64.21.130.6	A	insightbenefit.com
64.21.130.13	A	mail1.topsafetyresources.com
64.21.130.89	A	mail2.pgiswagift.com
64.21.130.90	A+PTR	mail3.pgiswagift.com
64.21.130.100	A	image.quotepremiere.com
64.21.130.100	A	dns1.quotepremiere.com
64.21.130.129	A+PTR	networkserver.whiterunriver.com
64.21.130.129	A	ns1.whiterunriver.com
64.21.130.130	A	ns2.whiterunriver.com
64.21.130.131	PTR	mailserver.whiterunriver.com
64.21.130.136	A	dns1.streamguideshade.com
64.21.130.200	A+PTR	ironport.scorestart.com
64.21.130.200	A	dns1.scorestart.com
64.21.130.201	A	dns2.scorestart.com
64.21.130.202	PTR	fwall2.scorestart.com
64.21.130.203	A	scorestart.com
64.21.131.10	A	corp.buyeretail.com
64.21.131.106	A	mail.masteraccountingsolutions.com
64.21.131.113	A	ns2.isitdead.com
64.21.131.154	A	hsphere2.nac.net
64.21.131.155	A	hsphere3.nac.net
64.21.131.156	A	hsphere4.nac.net
64.21.131.157	A	hsphere5.nac.net
64.21.132.140	PTR	this.ptr.is.named.in.honor.of.arin.nac.net
64.21.139.163	A	edgegroup.ai
64.21.139.163	A	www.edgegroup.ai
64.21.142.130	A	mail.masonboroforest.com
64.21.142.160	A	masonboroforest.com
64.21.143.23	A	www.dnsview.com
64.21.143.23	A	dnsview.com
64.21.143.23	A	dnsadept.com
64.21.143.24	A	cornfeed.com
64.21.143.200	PTR	ntbackup.pwebtech.com
64.21.144.67	A	ns.entegration.net
64.21.144.68	A	medsafe-security.com
64.21.144.70	PTR	training.entegration.net
64.21.144.76	A	hipaasecurenow.net
64.21.144.77	A	www.allnewyorktitle.com
64.21.145.197	PTR	bsd.danspics.com
64.21.145.198	A+PTR	cs.danspics.com
64.21.147.102	A	prp800-ibext01.inventivhealth.com
64.21.147.102	A	ns1.inventivhealth.com
64.21.147.108	A	monkeylips.com
64.21.147.108	A	shpadoinkle.com
64.21.147.132	A+PTR	ppysmtp01.inventivit.net
64.21.147.132	A	ppysmtp01.inventivhealth.com
64.21.147.133	A+PTR	ppysmtp02.inventivit.net
64.21.147.133	A	ppysmtp02.inventivhealth.com
64.21.148.1	PTR	ns1.okcom.net
64.21.148.3	PTR	ns1.okcom.net
64.21.148.4	PTR	ns1.okcom.net
64.21.148.10	A	ns1.okcom.net
64.21.148.10	A	okcom.net
64.21.148.16	A	shoprealty.net
64.21.148.16	A	virtual.huigeller.com
64.21.148.64	PTR	ns1.okcom.net
64.21.148.65	PTR	ns1.okcom.net
64.21.148.66	PTR	ns1.okcom.net
64.21.148.72	A	virtual.waikikibeachcondos.org
64.21.148.72	A	waikikibeachcondos.org
64.21.148.87	A	virtual.mccarthykelly.com
64.21.148.87	A	mccarthykelly.com
64.21.148.130	PTR	ns1.okcom.net
64.21.148.153	A	virtual.heritageeast.com
64.21.148.153	A	heritageeast.com
64.21.148.153	A	www.heritageeast.com
64.21.148.158	A	guide-of-prague.cz
64.21.148.192	PTR	ns1.okcom.net
64.21.148.194	A	mdevelopment.com
64.21.148.194	A	virtual.mdevelopment.com
64.21.148.195	PTR	ns1.okcom.net
64.21.148.211	A	martialartswindow.com
64.21.148.211	A	virtual.martialartswindow.com
64.21.149.144	A	postcardnation.com
64.21.149.144	A	print-u.com
64.21.149.145	A	websafeprocessing.com
64.21.149.167	A	bpdyttrlp.yi.org
64.21.150.21	A	wonderdesk.net
64.21.150.250	A	totalbalance.com
64.21.151.2	PTR	this.ptr.is.named.in.honor.of.arin.nac.net
64.21.151.72	A	mail.4-dsecurity.com
64.21.151.78	A	mx1.4-dsecurity.com
64.21.151.128	PTR	this.ptr.is.named.in.honor.of.arin.nac.net
64.21.151.131	PTR	this.ptr.is.named.in.honor.of.arin.nac.net
64.21.151.192	PTR	this.ptr.is.named.in.honor.of.arin.nac.net
64.21.151.195	PTR	this.ptr.is.named.in.honor.of.arin.nac.net
64.21.152.0	A	ns1.domain4seo.com
64.21.152.0	A	mail.domain4seo.com
64.21.152.0	A	www.domain4seo.com
64.21.152.1	A	ns2.domain4seo.com
64.21.152.67	PTR	64-21-152-67.site5.com
64.21.152.80	A	mail.hidehost.com
64.21.152.84	A	mail.fastdrugtesting.com
64.21.152.93	A	mail.podonomics.com
64.21.152.93	A	mail.softweb.info
64.21.152.128	A	mail.finecharms.com
64.21.152.145	A	polyphase.org
64.21.152.147	A	ns2.webcorehosting.com
64.21.152.148	A	ns2.webcorehosting.com
64.21.152.171	A	mail.totalwar.fr
64.21.152.200	A	mail.syndot.com
64.21.152.200	A	ns2.syndot.com
64.21.152.201	A	ns2.syndot.com
64.21.152.213	A	coolbook.org
64.21.152.213	A	mail.centrport.com
64.21.154.5	A	mailsanction.constitutionconference.com
64.21.154.5	A	mail3.professionalwomensdevelopment.com
64.21.154.6	A	mail4.professionalwomensdevelopment.com
64.21.154.7	A	mail5.professionalwomensdevelopment.com
64.21.154.67	PTR	this.ptr.is.named.in.honor.of.arin.nac.net
64.21.154.67	A	mail1.executiveadvancementcourses.com
64.21.154.76	A	mail3.executiveonlinecontent.com
64.21.154.77	A	mail4.executiveonlinecontent.com
64.21.154.78	A	mail5.executiveonlinecontent.com
64.21.154.137	A	mail1.hconlinetraining.com
64.21.154.138	A	mail2.hconlinetraining.com
64.21.154.139	A	mail3.hconlinetraining.com
64.21.154.150	A	mail1.management-resources.net
64.21.154.205	A	mail3.pbpexecreports.com
64.21.154.206	A	mail4.pbpexecreports.com
64.21.154.207	A	mail5.pbpexecreports.com
64.21.154.211	A	mail3.progcorp.com
64.21.156.8	A	ion1.vivitec.com
64.21.156.244	A	bitch.evillord.com
64.21.157.51	PTR	mail1.panda.dns-nac-zone.com
64.21.157.130	PTR	mail.linknj.net
64.21.157.130	A	dns.linknj.net
64.21.157.130	A	mail.imassocpr.com
64.21.157.200	A	*.linknj.com
64.21.157.200	A	www.latorreconstruction.com
64.21.157.200	A	cvfdnj.org
64.21.158.138	A	metta2all.com
64.21.164.4	A+PTR	mail.alplastics.com
64.21.164.11	A	mail.fullertons.com
64.21.164.38	A	mail.deyoe.com
64.21.164.51	A	mail.gardenstatehorseshow.org
64.21.164.82	A	mail.foodtownstores.com
64.21.164.101	A	mail.airlinkans.com
64.21.164.102	A	mail.tkghealth.com
64.21.164.102	A	mail.tkgtech.com
64.21.164.129	A	mail.frelinghuysenmiddleschool.org
64.21.164.133	A	mail.jsalawfirm.com
64.21.164.196	PTR	mail.gilmoreagency.com
64.21.164.205	A	thisisspam.nac.net
64.21.164.219	A	mail.handi-hut.com
64.21.164.224	A	mail.paradisebagco.com
64.21.164.226	A	mail.oggicoffee.com
64.21.172.20	PTR	this.ptr.is.named.in.honor.of.arin.nac.net
64.21.174.25	A	mail.ready-rest.com.ua
64.21.174.25	A	palmira-palace.ru
64.21.174.26	A	visarty.com
64.21.174.26	A	mail.visarty.com
64.21.174.65	A	mail.buyvigrx.co.uk
64.21.174.74	A	mail.kimballweb.com
64.21.174.74	A	kimballweb.com
64.21.174.82	A	infin1989.com
64.21.174.136	A	www.coringabiz.com.br
64.21.180.16	A	aefalertstwo.com
64.21.180.66	A+PTR	mail1.epicyx.com
64.21.180.104	A	mail5.sg-post.com
64.21.180.150	A+PTR	mail1.aefalertsone.com
64.21.180.153	A+PTR	mail4.aefalertsone.com
64.21.180.153	A	aefalertsone.com
64.21.180.153	A	www.aefalertsone.com
64.21.180.163	PTR	mail1.aefalertstwo.com
64.21.181.1	A	ns38.tdhn.net
64.21.181.2	A	ns39.tdhn.net
64.21.181.130	A	mail.manifest-der-rebellion.de
64.21.181.130	A	mail.united-satanism.net
64.21.181.130	A	united-satanism.net
64.21.182.22	PTR	this.ptr.is.named.in.honor.of.arin.nac.net
64.21.182.22	A	www.dwdtechllc.net
64.21.182.22	A	corporate.vertexhost.com
64.21.182.26	A	ns1.deuceswilddesigns.com
64.21.182.132	A	mail.pacsind.com
64.21.182.154	PTR	this.ptr.is.named.in.honor.of.arin.nac.net
64.21.182.230	PTR	this.ptr.is.named.in.honor.of.arin.nac.net
64.21.183.2	A+PTR	upgrade.nac.net
64.21.183.3	A	ipn.nac.net
64.21.183.6	A	internal.nac.net
64.21.183.8	PTR	www.15minuteservers.com
64.21.183.8	A	www.15minuteserver.com
64.21.183.173	A	smtp.windsordistributors.com