Robtex

Up: 64.136.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 64.136.20.0/23
Down right: 64.136.22.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.136.20.1	A+PTR	ve301-1.leaf.bu3.vgs.untd.com
64.136.20.2	PTR	ve301-1.r2.bu3.vgs.untd.com
64.136.20.18	A	dwstaging.nyc.untd.com
64.136.20.20	A+PTR	authns-ws.vgs.mysite.com
64.136.20.20	A	authns1.mysite.com
64.136.20.23	A	ns5.freeservers.com
64.136.20.24	PTR	ns4.freeservers.com
64.136.20.24	A	ns6.freeservers.com
64.136.20.30	A	ssl.safewebshop.com
64.136.20.31	A	argalleapond.htmlplanet.com
64.136.20.31	A	*.12megs.net
64.136.20.31	A	www.nemegrabe.htmlplanet.com
64.136.20.32	A	dns.oytunongan.com
64.136.20.32	A	www.nomissionimpossible.8m.net
64.136.20.32	A	lambertenterprises.8k.com
64.136.20.36	A	preslosubre.itgo.com
64.136.20.36	A	*.sawwemm.itgo.com
64.136.20.36	A	sasap.freeservers.com
64.136.20.37	A	*.thedihote.00go.com
64.136.20.40	A	daffenterpriseltd.com
64.136.20.40	A	*.slaveone.8m.com
64.136.20.40	A	www.anprinsodexc.gqnu.net
64.136.20.43	A	preslosubre.itgo.com
64.136.20.43	A	*.sawwemm.itgo.com
64.136.20.43	A	www.brynetenad.itgo.com
64.136.20.44	A	connellprocessing.com
64.136.20.44	A	*.thedihote.00go.com
64.136.20.44	A	veluyo.latinowebs.com
64.136.20.51	A	dns.soulwinners.biz
64.136.20.51	A	dns.backroomdesigns.com
64.136.20.51	A	ppwoodworks.com
64.136.20.52	A	djkevin.org
64.136.20.52	A	oasispradons.com
64.136.20.52	A	johncraven.net
64.136.20.56	A	jonwallaceracing.com
64.136.20.56	A	anointedchristian.net
64.136.20.56	A	darkpolygon.com
64.136.20.60	A	iguanakits.com
64.136.20.60	A	brandonb123.com
64.136.20.60	A	cwserv.com
64.136.20.64	A	connellprocessing.com
64.136.20.64	A	13carrot.org
64.136.20.64	A	nh3band.com
64.136.20.66	PTR	freeservers.com
64.136.20.67	PTR	mysite.com
64.136.20.68	PTR	communityarchitect.com
64.136.20.68	A	physicaltherapyschools.communityarchitect.com
64.136.20.68	A	estateagent.communityarchitect.com
64.136.20.69	PTR	50megs.com
64.136.20.71	PTR	mini.freeservers.com
64.136.20.71	PTR	mini.mysite.com
64.136.20.74	A	laserkit.com
64.136.20.74	A	blackstate.com
64.136.20.74	A	fox-lane.com
64.136.20.82	A	junowebmail.net
64.136.20.82	A	junoanywhere.net
64.136.20.100	A	mail.untd.com
64.136.20.120	A	lax-dns.nyc.untd.com
64.136.20.121	A	nyc-dns.nyc.untd.com
64.136.20.129	A	reject-dns.nyc.untd.com
64.136.20.132	A	maclock-dns.nyc.untd.com
64.136.20.139	A	qsdownload-dns2.nyc.untd.com
64.136.20.141	A	auth-vip1.nyc.untd.com
64.136.20.146	A	profile-dns.nyc.untd.com
64.136.20.147	A	msirs-dns.nyc.untd.com
64.136.20.150	A	mail.untd.com
64.136.20.159	A	restrict-dns.nyc.untd.com
64.136.20.160	A	mail.untd.com
64.136.20.164	A	outbound-mail.nyc.untd.com
64.136.20.165	A	zm.nyc.untd.com
64.136.20.166	A	pop.nyc.netzero.net
64.136.20.167	A	pop.nyc.juno.com
64.136.21.222	A	webmail.nyc.mysite.com