Robtex

Up: 72.18.200.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 72.18.201.0/25
Down right: 72.18.201.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.18.201.6	A	ns1.ga9k.com
72.18.201.6	A	mail.ga9k.com
72.18.201.6	A	ns2.ga9k.com
72.18.201.7	A	ns2.fo1y.com
72.18.201.7	A	ns1.fo1y.com
72.18.201.14	PTR	lasvegas-nv-datacenter.com
72.18.201.16	PTR	amigoseninternet.com
72.18.201.17	PTR	lasvegas-nv-datacenter.com
72.18.201.20	PTR	lasvegas-nv-datacenter.com
72.18.201.20	A	urpos.com
72.18.201.25	PTR	lasvegas-nv-datacenter.com
72.18.201.28	PTR	mail3.mxserver1.com
72.18.201.29	PTR	lasvegas-nv-datacenter.com
72.18.201.30	A	mail.visiononemortgage.com
72.18.201.33	PTR	mail8.mxserver1.com
72.18.201.33	A	mail.ishicompanies.com
72.18.201.71	PTR	lasvegas-nv-datacenter.com
72.18.201.78	PTR	lasvegas-nv-datacenter.com
72.18.201.78	A	www.kaiar.com
72.18.201.78	A	kaiar.com
72.18.201.88	PTR	lasvegas-nv-datacenter.com
72.18.201.88	A	www.uniwebb.com
72.18.201.88	A	ns1.staarband.com
72.18.201.89	PTR	lasvegas-nv-datacenter.com
72.18.201.89	A	bizznerd.com
72.18.201.89	A	ns2.uniwebb.com
72.18.201.116	A+PTR	mailer.e-sendhub.com
72.18.201.116	A	www.stirista.com
72.18.201.116	A	adbogie.com
72.18.201.120	A	neonanalytics.com
72.18.201.121	A	mail.neonanalytics.com
72.18.201.175	PTR	lasvegas-nv-datacenter.com
72.18.201.184	A	djreports.com
72.18.201.198	A	mail.coupcoupon.com
72.18.201.199	PTR	verify.salvationsavings.com
72.18.201.199	A	escasinobonus.com
72.18.201.199	A	ptcasinobonus.com
72.18.201.200	A	encasinobonus.com
72.18.201.202	A	decasinobonus.com
72.18.201.208	A	mail.bgcasinobonus.com
72.18.201.209	A	dkcasinobonus.com
72.18.201.210	A	grcasinobonus.com
72.18.201.211	PTR	info.salvationsavings.com
72.18.201.211	A	hucasinobonus.com
72.18.201.212	PTR	time.salvationsavings.com
72.18.201.212	A	trcasinobonus.com
72.18.201.213	A	plcasinobonus.com
72.18.201.213	A	rocasinobonus.com
72.18.201.238	PTR	lasvegas-nv-datacenter.com