Robtex

Up: 72.18.198.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 72.18.199.0/25
Down right: 72.18.199.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.18.199.31	PTR	lasvegas-nv-datacenter.com
72.18.199.42	PTR	lasvegas-nv-datacenter.com
72.18.199.52	PTR	lasvegas-nv-datacenter.com
72.18.199.68	PTR	stream.materialsmineral.com
72.18.199.74	PTR	stream.planetearthagency.com
72.18.199.79	PTR	stream.liquidbed.com
72.18.199.81	PTR	stream.bestfirerescue.com
72.18.199.86	PTR	akgul.info
72.18.199.86	A	monetizetheweb.com
72.18.199.86	A	ns1.polandforvisitors.com
72.18.199.94	A+PTR	opentip.com
72.18.199.94	A	www.officeship.com
72.18.199.94	A	mail.hiidea.com
72.18.199.95	PTR	opentip.com
72.18.199.104	A	911giftbaskets.com
72.18.199.104	A	www.911giftbaskets.com
72.18.199.109	PTR	lasvegas-nv-datacenter.com
72.18.199.109	A	ns3.weyrichenterprises.com
72.18.199.109	A	ns4.weyrichenterprises.com
72.18.199.110	A+PTR	weyrichenterprises.com
72.18.199.110	A	ns1.weyrichenterprises.com
72.18.199.111	A+PTR	andrewweyrich.com
72.18.199.111	A	ns4.weyrichenterprises.com
72.18.199.116	A	divaliciousapp.com
72.18.199.117	A	sinner2saintapp.com
72.18.199.118	PTR	lasvegas-nv-datacenter.com
72.18.199.118	A	25kdays.com
72.18.199.120	A+PTR	sellpin.com
72.18.199.125	A	weightwagerapp.com
72.18.199.126	A	hailcab.com
72.18.199.127	A	parkerparrot.com
72.18.199.130	PTR	lasvegas-nv-datacenter.com
72.18.199.130	A	ns2.weyrichenterprises.com
72.18.199.133	PTR	lasvegas-nv-datacenter.com
72.18.199.135	PTR	lasvegas-nv-datacenter.com
72.18.199.135	A	src.stmchile.cl
72.18.199.174	PTR	lasvegas-nv-datacenter.com
72.18.199.174	A	mail.eseoh.com
72.18.199.182	PTR	lasvegas-nv-datacenter.com
72.18.199.182	A	riphost.com
72.18.199.182	A	sambandham.com
72.18.199.192	A	dynamicpublishers.com
72.18.199.195	A	snapcentral.net
72.18.199.197	PTR	lasvegas-nv-datacenter.com
72.18.199.197	A	meiservices.com
72.18.199.244	A	vm2-esxi-las.agents.thousandeyes.com