Robtex

Up: 64.136.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 64.136.52.0/23
Down right: 64.136.54.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.136.52.11	A+PTR	dns-mail01.vgs.untd.com
64.136.52.13	A+PTR	dns-mail03.vgs.untd.com
64.136.52.14	PTR	dns-mail04.vgs.untd.com
64.136.52.17	A+PTR	feed.vgs.untd.com
64.136.52.17	A	feed.untd.com
64.136.52.18	A+PTR	cyclops.vgs.untd.com
64.136.52.18	A	cyclops.prod.untd.com
64.136.52.21	PTR	nztv.vgs.untd.com
64.136.52.21	A	nztv.juno.com
64.136.52.21	A	nztv.netzero.net
64.136.52.22	PTR	vas-ui.vgs.untd.com
64.136.52.25	A+PTR	phoenix.vgs.untd.com
64.136.52.25	A	phoenixcm.untd.com
64.136.52.25	A	phoenix.untd.com
64.136.52.27	A+PTR	dl.vgs.atg.untd.com
64.136.52.33	A+PTR	zm.vgs.untd.com
64.136.52.33	A	zm.netzero.net
64.136.52.34	A+PTR	pop.vgs.netzero.net
64.136.52.34	A	pop.netzero.net
64.136.52.35	PTR	pop.vgs.juno.com
64.136.52.36	PTR	pop.vgs.mybluelight.com
64.136.52.36	A	pop.mybluelight.com
64.136.52.37	A+PTR	mx.vgs.untd.com
64.136.52.37	A	mx-fol.vgs.untd.com
64.136.52.37	A	mx-ws-beta.vgs.untd.com
64.136.52.38	PTR	mxcorp.vgs.untd.com
64.136.52.40	PTR	smtp.vgs.emailmyname.com
64.136.52.40	A	smtp.mybluelight.com
64.136.52.40	A	smtp.emailmyname.com
64.136.52.42	PTR	mp.vgs.untd.com
64.136.52.43	PTR	rd.vgs.ads.juno.com
64.136.52.44	A+PTR	smtp.vgs.netzero.net
64.136.52.44	A	authsmtp.netzero.net
64.136.52.44	A	smtp.netzero.net
64.136.52.45	PTR	smtp.vgs.juno.com
64.136.52.45	A	smtp.juno.com
64.136.52.47	PTR	umap.vgs.juno.com
64.136.52.48	PTR	pop.vgs.netzero.com
64.136.52.48	A	pop.netzero.com
64.136.52.48	A	pop-com.netzero.net
64.136.52.49	A+PTR	content.vgs.untd.com
64.136.52.49	A	content.untd.com
64.136.52.50	PTR	smtp.vgs.netzero.com
64.136.52.53	PTR	m03.bos.untd.com
64.136.52.56	PTR	m06.bos.untd.com
64.136.52.60	PTR	authns-spare.vgs.untd.com
64.136.52.60	A	authns3.untd.com
64.136.52.60	A	authns3.emailmyname.com
64.136.52.66	A	apserv.vgs.untd.com
64.136.52.66	A	cf.netzero.net
64.136.52.68	A+PTR	radius.vgs.mini.untd.com
64.136.52.70	A+PTR	apserv.vgs.mini.untd.com
64.136.52.71	A+PTR	searchap.vgs.untd.com
64.136.52.71	A	searchap.lax.untd.com
64.136.52.72	A	cdrestrict-dns.vgs.untd.com
64.136.52.73	A+PTR	vgs-dns.vgs.untd.com
64.136.52.74	A+PTR	dca-dns.vgs.untd.com
64.136.52.75	A+PTR	minidns.vgs.mini.untd.com
64.136.52.78	A+PTR	eap-dns.vgs.untd.com
64.136.52.79	A	ccfail-dns.vgs.untd.com
64.136.52.80	A+PTR	resetpw-dns.vgs.untd.com
64.136.52.82	A+PTR	reject-dns.vgs.untd.com
64.136.52.83	A+PTR	maclock-dns.vgs.untd.com
64.136.52.89	A+PTR	resetpw-dns2.vgs.untd.com
64.136.52.93	A+PTR	auth-vip2.vgs.untd.com
64.136.52.95	A+PTR	msirs-dns2.vgs.untd.com
64.136.52.96	A	maclock-dns2.vgs.untd.com
64.136.52.97	A+PTR	profile-dns.vgs.untd.com
64.136.52.100	A	auth-vip3.vgs.untd.com
64.136.52.101	A+PTR	auth-vip4.vgs.untd.com
64.136.52.102	A+PTR	message-dns.vgs.untd.com
64.136.52.103	A+PTR	restrict-dns.vgs.untd.com
64.136.52.104	A+PTR	bb-dca-dns.vgs.untd.com
64.136.52.105	A+PTR	bb-vgs-dns.vgs.untd.com
64.136.52.106	A+PTR	nose-dca-dns.vgs.untd.com
64.136.52.107	A+PTR	nose-vgs-dns.vgs.untd.com
64.136.52.108	A+PTR	radius-cisp.vgs.untd.com
64.136.52.109	A+PTR	radius-ynp.vgs.untd.com
64.136.52.111	A+PTR	message-dns.vgs.mini.untd.com
64.136.52.112	A+PTR	restrict-dns.vgs.mini.untd.com
64.136.52.113	A+PTR	cdrestrict-dns.vgs.mini.untd.com
64.136.52.114	PTR	authns1.mypoints.com
64.136.52.115	A+PTR	authns1.untd.com
64.136.52.115	A	authns.vgs.untd.com
64.136.52.118	A+PTR	authns1.emailmyname.com
64.136.52.118	A	authns3.emailmyname.com
64.136.52.118	A	authns.vgs.emailmyname.com
64.136.52.120	A+PTR	radacct2.vgs.untd.com
64.136.52.126	A+PTR	wl-dns.vgs.untd.com
64.136.52.127	PTR	cwbh-dns.vgs.untd.com
64.136.52.130	PTR	ve105.r2.bu1.vgs.untd.com
64.136.53.22	A+PTR	dl.vgs.netzero.net
64.136.53.22	A	dl.netzero.net
64.136.53.22	A	dl.dca.netzero.net
64.136.53.25	PTR	accountb.vgs.untd.com
64.136.53.25	A	accountb.juno.com
64.136.53.25	A	accountb.untd.com
64.136.53.26	A+PTR	accountb.vgs.netzero.net
64.136.53.26	A	accountb.netzero.net
64.136.53.27	PTR	accountb.vgs.mybluelight.com
64.136.53.28	A+PTR	register.vgs.netzero.net
64.136.53.28	A	register.netzero.net
64.136.53.30	A+PTR	track.vgs.untd.com
64.136.53.30	A	track.untd.com
64.136.53.31	PTR	track.vgs.netzero.net
64.136.53.32	A+PTR	track.vgs.juno.com
64.136.53.32	A	track.juno.com
64.136.53.37	A+PTR	accountb.vgs.juno.com
64.136.53.38	A+PTR	search.vgs.untd.com
64.136.53.38	A	endphonespam.biz
64.136.53.38	A	nzplatinum.com
64.136.53.39	PTR	my.vgs.netzero.com
64.136.53.43	PTR	www.vgs.atg.untd.com
64.136.53.43	A	www.bluelightsurfspeed.com
64.136.53.43	A	www.lax.mybluelight.com
64.136.53.44	PTR	start.vgs.mybluelight.com
64.136.53.44	A	mobile-mybluelight.com
64.136.53.44	A	startbluelight.com
64.136.53.46	PTR	my.vgs.juno.com
64.136.53.46	A	mobile-juno.com
64.136.53.48	A+PTR	my-z3lock.vgs.juno.com
64.136.53.51	A+PTR	my-resetpw.vgs.juno.com
64.136.53.52	A	my-profile.vgs.juno.com
64.136.53.58	A	my-resetpw.vgs.atg.untd.com
64.136.53.59	A+PTR	webmail.vgs.mybluelight.com
64.136.53.59	A	webmail.mybluelight.com
64.136.53.61	A+PTR	mirs.vgs.netzero.net
64.136.53.64	PTR	vanity.vgs.mysite.com
64.136.53.64	A	www.king.us
64.136.53.64	A	cross.us
64.136.53.68	A+PTR	account.vgs.juno.com
64.136.53.68	A	account.juno.com
64.136.53.69	PTR	account.vgs.netzero.net
64.136.53.69	A	freei.net
64.136.53.69	A	account.netzero.net
64.136.53.71	PTR	my.vgs.netzero.net
64.136.53.72	A+PTR	my-z3lock.vgs.untd.com
64.136.53.79	A+PTR	my-profile.vgs.untd.com
64.136.53.81	PTR	account.vgs.untd.com
64.136.53.81	A	account.netzero.com
64.136.53.81	A	account.untd.com
64.136.53.83	PTR	webmail.vgs.netzero.net
64.136.53.83	A	webmail.netzero.com
64.136.53.83	A	webmaila.netzero.net
64.136.53.84	A+PTR	webmail.vgs.juno.com
64.136.53.84	A	webmail.juno.com
64.136.53.84	A	webmaila.juno.com
64.136.53.90	A	circuitcity.vgs.netzero.net
64.136.53.94	A	my-message.vgs.juno.com
64.136.53.100	A	my-cdrestrict.vgs.mybluelight.com
64.136.53.101	A	redirect.www.vgs.netzero.net
64.136.53.105	A+PTR	kmart-redirect.vgs.netzero.net
64.136.53.113	A+PTR	dl.www.juno.com
64.136.53.114	A+PTR	dl2.www.juno.com
64.136.53.116	A+PTR	ordercd.vgs.netzero.net
64.136.53.116	A	ordercd.netzero.net
64.136.53.141	A+PTR	webmail.stg.vgs.netzero.net
64.136.53.143	PTR	downtown.la.spinway.com
64.136.53.144	A+PTR	world.la.spinway.com
64.136.53.144	A	www.spinway.com
64.136.53.145	A+PTR	webmail.vgs.emailmyname.com
64.136.53.151	A+PTR	www.vgs.netzeromarketing.com
64.136.53.151	A	www.netzeromarketing.com
64.136.53.168	PTR	www.vgs.netzero.net
64.136.53.168	A	www.netzero.net
64.136.53.168	A	netzero.net
64.136.53.169	PTR	www.vgs.juno.com
64.136.53.178	PTR	store.vgs.juno.com
64.136.53.178	A	store.juno.com
64.136.53.179	A+PTR	store.vgs.netzero.net
64.136.53.179	A	store.netzero.net
64.136.53.183	A+PTR	phonereg.vgs.untd.com
64.136.53.184	A+PTR	webmailab.juno.com
64.136.53.185	A+PTR	webmailab.netzero.net
64.136.53.185	A	webmailab.uolimg.com
64.136.53.185	A	webmailab.uolstatic.com
64.136.53.186	PTR	webmailab.mybluelight.com
64.136.53.187	PTR	webmailab.mysite.com
64.136.53.188	A+PTR	vpmda.netzero.net
64.136.53.189	A+PTR	vpmdab.netzero.net
64.136.53.190	A+PTR	vpmda.juno.com
64.136.53.191	A+PTR	vpmdab.juno.com
64.136.53.192	A	vpmd-httpa.netzero.net
64.136.53.193	A+PTR	vpmd-httpab.netzero.net
64.136.53.194	A	vpmd-httpa.juno.com
64.136.53.195	A	vpmd-httpab.juno.com
64.136.53.212	A+PTR	help.vgs.juno.com
64.136.53.212	A	help.juno.com
64.136.53.213	PTR	help.vgs.netzero.net
64.136.53.213	A	help.netzero.net
64.136.53.215	PTR	tagline.vgs.juno.com
64.136.53.215	A	thirdpartyoffers.juno.com
64.136.53.216	PTR	tagline.vgs.netzero.net
64.136.53.216	A	tagline.netzero.net
64.136.53.219	PTR	captcha.vgs.uolimg.com
64.136.53.219	A	captcha.uolimg.com
64.136.53.220	PTR	www.vgs.untd.com
64.136.53.220	A	leyjekowsma.freehosting.net
64.136.53.220	A	www.nuticnijes.freehosting.net
64.136.53.221	PTR	postmaster.vgs.untd.com
64.136.55.3	A+PTR	blaze1.vgs.untd.com
64.136.55.10	A+PTR	outbound-bu0.vgs.untd.com
64.136.55.11	PTR	outbound-bu1.vgs.untd.com
64.136.55.19	A+PTR	outbound-mua.vgs.untd.com
64.136.55.36	A+PTR	outbound-mail02.vgs.untd.com
64.136.55.37	A+PTR	outbound-mail03.vgs.untd.com
64.136.55.50	PTR	blue.vgs.untd.com
64.136.55.50	A	mailtransfer.vgs.untd.com