Robtex

Up: 72.18.192.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 72.18.192.0/25
Down right: 72.18.192.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.18.192.4	PTR	lasvegas-nv-datacenter.com
72.18.192.4	A	nike-heaven.net
72.18.192.8	PTR	lasvegas-nv-datacenter.com
72.18.192.8	A	ns1.austinfireflies.org
72.18.192.9	A	ns2.austinfireflies.org
72.18.192.9	A	ns2.blankenship.com
72.18.192.10	PTR	colo.property-mgmt.com
72.18.192.10	A	atlasgrouptampallc.com
72.18.192.10	A	aghouston.com
72.18.192.11	A	colo.property-mgmt.com
72.18.192.12	PTR	lasvegas-nv-datacenter.com
72.18.192.12	A	ncpm.org
72.18.192.18	PTR	lasvegas-nv-datacenter.com
72.18.192.18	A	ns.al-limite.com.mx
72.18.192.18	A	ns.laminasplastico.com.mx
72.18.192.27	PTR	lasvegas-nv-datacenter.com
72.18.192.27	A	yz6.cn
72.18.192.29	PTR	lasvegas-nv-datacenter.com
72.18.192.29	A	he88.cn
72.18.192.29	A	www.mianhun.com
72.18.192.31	A	mail.jersey-numbers.com
72.18.192.31	A	jersey-numbers.com
72.18.192.46	A	vixola-dev.com
72.18.192.56	PTR	lasvegas-nv-datacenter.com
72.18.192.56	A	topcerts.com
72.18.192.60	A	carreraking.net
72.18.192.60	A	nikeheaven.in
72.18.192.61	PTR	lasvegas-nv-datacenter.com
72.18.192.61	A	nikeheaven.info
72.18.192.61	A	nikeheaven.me
72.18.192.78	PTR	lasvegas-nv-datacenter.com
72.18.192.78	A	mail.callboxinc.net
72.18.192.80	PTR	lasvegas-nv-datacenter.com
72.18.192.80	A	examways.com
72.18.192.92	PTR	lasvegas-nv-datacenter.com
72.18.192.98	PTR	lasvegas-nv-datacenter.com
72.18.192.98	A	clicktosched.me
72.18.192.99	PTR	lasvegas-nv-datacenter.com
72.18.192.103	A+PTR	server.contactdb.com
72.18.192.103	A	www.contactdb.com
72.18.192.103	A	mail.contactdb.com
72.18.192.106	A	carreraking.biz
72.18.192.107	A	carreraking.co
72.18.192.107	A	nikeheaven.co
72.18.192.108	PTR	lasvegas-nv-datacenter.com
72.18.192.108	A	ns01.callboxinc.com
72.18.192.116	PTR	lasvegas-nv-datacenter.com
72.18.192.116	A	mail.differentslants.com
72.18.192.116	A	epiphytellc.biz
72.18.192.117	PTR	lasvegas-nv-datacenter.com
72.18.192.117	A	mail.freemodelfoundry.com
72.18.192.117	A	modelfoundryservices.com
72.18.192.126	A	secondtry1.ath.cx
72.18.192.130	PTR	lasvegas-nv-datacenter.com
72.18.192.130	A	ns2.peklava.com
72.18.192.136	A	ns2.laxmipyare.com
72.18.192.137	PTR	lasvegas-nv-datacenter.com
72.18.192.138	A	testchief.com
72.18.192.139	PTR	lasvegas-nv-datacenter.com
72.18.192.139	A	ccieland.com
72.18.192.143	PTR	lasvegas-nv-datacenter.com
72.18.192.143	A	insidetests.com
72.18.192.145	PTR	lasvegas-nv-datacenter.com
72.18.192.146	PTR	lasvegas-nv-datacenter.com
72.18.192.146	A	stitchits.com
72.18.192.146	A	mail.stitchits.com
72.18.192.147	A+PTR	mail.shoppersrule.com
72.18.192.147	A	shoppersrule.com
72.18.192.147	A	ns2.shoppersrule.com
72.18.192.148	A	partnernewspaper.com
72.18.192.148	A	mail.partnernewspaper.com
72.18.192.172	PTR	lasvegas-nv-datacenter.com
72.18.192.172	A	intelmetering.com
72.18.192.195	PTR	lasvegas-nv-datacenter.com
72.18.192.197	PTR	lasvegas-nv-datacenter.com
72.18.192.216	A+PTR	mail.tfrepublicanclub.com
72.18.192.216	A	ns2.tfrepublicanclub.com
72.18.192.216	A	tfrepublicanclub.com
72.18.192.219	PTR	lasvegas-nv-datacenter.com
72.18.192.219	A	themurphyfamilysite.com
72.18.192.219	A	mail.themurphyfamilysite.com
72.18.192.232	PTR	lasvegas-nv-datacenter.com
72.18.192.232	A	fxr.ro
72.18.192.232	A	www.fxr.ro
72.18.192.234	A	link.terrigalsurfclub.com
72.18.192.234	A	link.avocaarchitectural.com
72.18.192.234	A	mielech-gruppe.de
72.18.192.235	PTR	lasvegas-nv-datacenter.com
72.18.192.238	PTR	lasvegas-nv-datacenter.com
72.18.192.238	A	stmtrade.cl
72.18.192.238	A	www.stmchile.cl
72.18.192.240	PTR	lasvegas-nv-datacenter.com
72.18.192.241	PTR	lasvegas-nv-datacenter.com
72.18.192.251	PTR	serverpoint.com
72.18.192.251	A	dns2.serverpoint.com
72.18.192.251	A	dns6.serverpoint.com