Robtex

Up: 64.31.128.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 64.31.128.0/20
Down right: 64.31.144.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.31.128.14	PTR	premierwater.com
64.31.130.4	A	mail.truenetenergysolutions.com
64.31.130.36	PTR	listserve.sqe.com
64.31.130.135	PTR	www.loadking.com
64.31.130.138	PTR	mail.loadking.com
64.31.131.18	PTR	jaxfw.mpka.com
64.31.131.19	PTR	mpka.com
64.31.131.19	PTR	exeter1.mpka.com
64.31.131.19	PTR	mail.mpka.com
64.31.131.51	A+PTR	email.sawgrassmarriott.com
64.31.132.129	A+PTR	pool.gottlieb.com
64.31.132.129	A	host129.gottlieb.com
64.31.132.130	A	host130.gottlieb.com
64.31.132.137	A	mail2.gottlieb.com
64.31.132.145	A	mail2.gottlieb.com
64.31.132.246	PTR	mail.erccollections.com
64.31.132.250	PTR	mail.erccollections.com
64.31.133.69	A	darcyhay.com
64.31.133.115	A	mail.gunncoim.com
64.31.133.154	PTR	mail.ovationsjacksonville.com
64.31.134.109	A	www.blastshield.com
64.31.136.233	PTR	alt3.computerpoint.net
64.31.138.50	PTR	mail.realdatacenter.com
64.31.139.209	PTR	mail.itera.com
64.31.141.2	PTR	mail.abcoa.com
64.31.141.25	PTR	mail.abcoa.net
64.31.141.60	PTR	pi-centers.com
64.31.143.131	PTR	mail.computerpoint.net
64.31.143.132	PTR	mail.computerpoint.net
64.31.143.162	PTR	webmail.sterlinghealthcare.com
64.31.143.164	A	smtp.cfsbilling.com
64.31.145.10	A	mail.npbcid.org
64.31.145.102	PTR	email.niprodiagnostics.com
64.31.145.102	A	mail1.hdidiabetes.com
64.31.145.102	A	email.homediagnostics.com
64.31.145.104	PTR	email.homediagnostics.com
64.31.148.32	PTR	adv-pub.com
64.31.148.110	PTR	thestyleworks.com
64.31.148.110	PTR	screenworksusa.net
64.31.148.178	PTR	host178.architecturalaluminum.com
64.31.148.229	PTR	mail.libertyprop.com
64.31.149.36	PTR	smtp2.jones-hurley-hand.com
64.31.149.114	PTR	mark.dataminiusa.com
64.31.149.162	PTR	mail2.beckdr.com
64.31.149.163	PTR	mail.beckdr.com
64.31.149.164	A	beckdr.net
64.31.149.194	PTR	beldcex1.avatarholdings.com
64.31.151.62	A	xchg.flfirm.com
64.31.151.101	PTR	mail2.meridiantechnologies.net
64.31.151.165	PTR	mail.amtechcs.com
64.31.151.165	PTR	mail.servtrac.net
64.31.151.226	PTR	mail.gottlieb.com
64.31.151.226	A+PTR	ftp.fep.gottlieb.com
64.31.151.226	A+PTR	ftp.indian.gottlieb.com
64.31.152.38	PTR	abs.flrda.telcove.net
64.31.153.41	A	evguideonline.com
64.31.153.41	A	www.evguideonline.com
64.31.153.69	A	smtp-01.nikonet.com
64.31.153.69	A	public.dmsgs.com
64.31.153.69	A	public.nikonet.com
64.31.153.70	A	nikonet.com
64.31.155.98	PTR	outlook.alfordclausen.com
64.31.155.143	PTR	mail02.stmae.com
64.31.156.38	PTR	mail.lyonfrycadden.com
64.31.157.96	PTR	winkenterprises.adelphiabusiness.net
64.31.157.97	PTR	winkenterprises.adelphiabusiness.net
64.31.157.99	PTR	winkenterprises.adelphiabusiness.net
64.31.158.137	PTR	williamsonvermost.telcovebusiness.net
64.31.158.170	PTR	tampamail.mattstone.com
64.31.158.210	PTR	trax.tpghotels.com
64.31.159.3	PTR	mail.elutions.com
64.31.159.35	PTR	mail.lxicomponents.com
64.31.159.66	PTR	server01.hydeparkbuilders.com
64.31.159.66	PTR	vpn.hydeparkbuilders.com
64.31.159.81	A	flaquarium.net
64.31.159.81	A	wahoo.flaquarium.org
64.31.159.81	A	brewsbythebay.org
64.31.159.138	PTR	mail.tampabay.redcross.org
64.31.159.138	PTR	www.tampabay.redcross.org
64.31.159.139	PTR	mail.tampabay.redcross.org
64.31.159.139	PTR	www.tampabay.redcross.org
64.31.159.172	PTR	mail.lorenzen.ws
64.31.159.172	PTR	www.lorenzen.ws