Robtex

Up: 72.18.204.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 72.18.206.0/24
Down right: 72.18.207.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.18.206.4	PTR	lasvegas-nv-datacenter.com
72.18.206.4	A	cm.siloxserver.com
72.18.206.4	A	siloxserver.com
72.18.206.5	PTR	lasvegas-nv-datacenter.com
72.18.206.5	A	ns1.siloxserver.com
72.18.206.6	PTR	lasvegas-nv-datacenter.com
72.18.206.6	A	ns2.siloxserver.com
72.18.206.7	PTR	lasvegas-nv-datacenter.com
72.18.206.7	A	beyondinfinite.com
72.18.206.7	A	beyondinfinite.in
72.18.206.8	A	beyondinfinite.in
72.18.206.8	A	admirekids.com
72.18.206.9	A	digitalelab.com
72.18.206.10	A	spectramirror.com
72.18.206.10	A	xn--ekr399dt6c.com
72.18.206.11	A	dagmarmedia.com
72.18.206.14	PTR	lasvegas-nv-datacenter.com
72.18.206.14	A	directionbox.com
72.18.206.14	A	perfectionnementacheteur.com
72.18.206.18	PTR	lasvegas-nv-datacenter.com
72.18.206.33	PTR	lasvegas-nv-datacenter.com
72.18.206.33	A	montare.net
72.18.206.33	A	fietsenmetdehond.nl
72.18.206.35	PTR	lasvegas-nv-datacenter.com
72.18.206.42	PTR	ilxsrv1.0net.com.br
72.18.206.42	A	mail.maxsinal.com.br
72.18.206.42	A	mail.sessanitarios.com.br
72.18.206.43	PTR	ilxsrv1-2.0net.com.br
72.18.206.43	A	ns2.interlagosnet.com.br
72.18.206.43	A	ns2.mevam.org.br
72.18.206.44	PTR	lasvegas-nv-datacenter.com
72.18.206.44	A	ordercore.com
72.18.206.44	A	doggysnooze.eu
72.18.206.45	PTR	lasvegas-nv-datacenter.com
72.18.206.45	A	montare.net
72.18.206.50	PTR	lasvegas-nv-datacenter.com
72.18.206.60	A	mail.giles.ws
72.18.206.60	A	one.seti.us
72.18.206.60	A	mail2.giles.ws
72.18.206.64	PTR	lasvegas-nv-datacenter.com
72.18.206.72	A	mail.atlantisring.be
72.18.206.74	A	webmail.securvest.net
72.18.206.74	A	securvest.net
72.18.206.99	PTR	lasvegas-nv-datacenter.com
72.18.206.101	PTR	lasvegas-nv-datacenter.com
72.18.206.101	A	mail.laurabmusic.com
72.18.206.126	PTR	lasvegas-nv-datacenter.com
72.18.206.127	PTR	lasvegas-nv-datacenter.com
72.18.206.129	PTR	lasvegas-nv-datacenter.com
72.18.206.132	PTR	lasvegas-nv-datacenter.com
72.18.206.136	PTR	algolayer.net
72.18.206.136	A	mail.algohost.net
72.18.206.136	A	*.winegiftmarket.com
72.18.206.137	PTR	algolayer.net
72.18.206.138	PTR	mail.mailroot.yazilim-evi.com
72.18.206.138	A	kircains.com
72.18.206.138	A	m3csoft.com
72.18.206.139	PTR	lasvegas-nv-datacenter.com
72.18.206.146	PTR	lasvegas-nv-datacenter.com
72.18.206.146	A	alexhao.info
72.18.206.153	A	gittigidiyorentegrasyonu.com
72.18.206.154	PTR	lasvegas-nv-datacenter.com
72.18.206.154	A	webhost01.cogentes.com
72.18.206.154	A	ip.jeffersonhosp.com
72.18.206.167	PTR	lasvegas-nv-datacenter.com
72.18.206.183	PTR	lasvegas-nv-datacenter.com
72.18.206.199	PTR	lasvegas-nv-datacenter.com
72.18.206.203	PTR	lasvegas-nv-datacenter.com
72.18.206.203	A	xml11es.farolatino.com
72.18.206.207	A	mail.online-kerala.com
72.18.206.207	A	mail.mouryaproperties.com
72.18.206.207	A	mail.epi-india.com
72.18.206.208	PTR	lasvegas-nv-datacenter.com
72.18.206.221	A	thetangocatalog.com
72.18.206.224	PTR	lasvegas-nv-datacenter.com
72.18.206.237	PTR	lasvegas-nv-datacenter.com
72.18.206.244	PTR	lasvegas-nv-datacenter.com
72.18.207.65	PTR	lasvegas-nv-datacenter.com
72.18.207.75	PTR	lasvegas-nv-datacenter.com
72.18.207.132	A+PTR	alecka.asdf456.com
72.18.207.132	A	aplusfaq.com
72.18.207.132	A	*.aplusfaq.com
72.18.207.135	PTR	lasvegas-nv-datacenter.com
72.18.207.135	A	serverpoint.in
72.18.207.136	PTR	emailserver1.asdf456.com
72.18.207.136	A	email-mx.kidcademics.com
72.18.207.136	A	email-mx.jacksondrive.org
72.18.207.139	PTR	lasvegas-nv-datacenter.com
72.18.207.139	A	email-mx.limecatdesign.com
72.18.207.139	A	email-mx.flannelmoosedesign.com
72.18.207.140	PTR	serverpoint.com
72.18.207.140	A	email-mx.verivikatorinsent.com
72.18.207.140	A	email-mx.divedownphuket.com
72.18.207.141	PTR	alecka.asdf456.com
72.18.207.143	PTR	emailserver4.asdf456.com
72.18.207.143	A	mail.hjr.org
72.18.207.143	A	email-mx.djrpartners.com
72.18.207.148	PTR	lasvegas-nv-datacenter.serverpoint.com
72.18.207.148	A	mysql1a.asdf456.com
72.18.207.151	PTR	lasvegas-nv-datacenter.com
72.18.207.151	A	apluspanel.com
72.18.207.161	PTR	serverpoint.com
72.18.207.161	A	aplusstats.com
72.18.207.161	A	*.aplusstats.com
72.18.207.180	PTR	serverpoint.com
72.18.207.180	A	mail.eucim.es
72.18.207.180	A	smtp.eucim.es
72.18.207.182	PTR	emailserver4-182.asdf456.com
72.18.207.182	A	mail.eucim.com
72.18.207.183	PTR	emailserver4-183.asdf456.com
72.18.207.183	A	mail1.healthylovedones.com
72.18.207.188	PTR	emailserver4-188.asdf456.com
72.18.207.188	A	mail.azteccharter.com
72.18.207.255	PTR	lasvegas-nv-datacenter.com