Robtex

Up: 72.221.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 72.221.0.0/20
Down right: 72.221.16.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.221.0.131	A	ataacec805e7a69.mm.pn.at.cox.net
72.221.4.15	PTR	wsip-72-221-4-15.dc.dc.cox.net
72.221.4.15	A	honestyandethics.com
72.221.4.15	A	easystonecenter.com
72.221.4.72	A	*.goldbeltraven.com
72.221.4.72	A	goldbeltmaster.goldbeltraven.com
72.221.4.72	A	mailhost.goldbeltraven.com
72.221.4.112	A+PTR	mail.br-envision.com
72.221.4.151	A+PTR	wsip-72-221-4-151.dc.dc.cox.net
72.221.4.151	A	mx.it-techservice.com
72.221.4.151	A	*.it-techservice.com
72.221.5.106	A+PTR	wsip-72-221-5-106.dc.dc.cox.net
72.221.5.106	A	washingtondoc.com
72.221.5.106	A	mail.norvarhealthservices.com
72.221.5.107	PTR	wsip-72-221-5-107.dc.dc.cox.net
72.221.5.215	A+PTR	wsip-72-221-5-215.dc.dc.cox.net
72.221.6.60	A	mail.rrtmail.com
72.221.6.60	A	mail2.wilbell.com
72.221.6.206	A+PTR	wsip-72-221-6-206.dc.dc.cox.net
72.221.6.206	A	myverisolv.com
72.221.7.3	A+PTR	wsip-72-221-7-3.dc.dc.cox.net
72.221.7.3	A	mail.jamaheatingandcooling.com
72.221.7.3	A	remote.jamaheatingandcooling.com
72.221.7.66	A	mail.systemsdefinition.com
72.221.8.2	A+PTR	ns01.fament.com
72.221.8.2	A	ns1.fament.com
72.221.8.3	PTR	mail.wisp-router.com
72.221.8.3	A	imail.fament.com
72.221.8.3	A	mail.signorellis.com
72.221.8.4	PTR	wsip-72-221-8-4.ks.ks.cox.net
72.221.8.6	PTR	wsip-72-221-8-6.ks.ks.cox.net
72.221.9.2	A+PTR	wsip-72-221-9-2.ks.ks.cox.net
72.221.9.2	A	ns2.fament.com
72.221.9.2	A	ns02.fament.com
72.221.12.213	A+PTR	wsip-72-221-12-213.dc.dc.cox.net
72.221.14.133	A+PTR	wsip-72-221-14-133.dc.dc.cox.net
72.221.14.133	A	odinwwcore.com
72.221.15.2	A+PTR	wsip-72-221-15-2.dc.dc.cox.net
72.221.19.4	A+PTR	ip72-221-19-4.ph.ph.cox.net
72.221.19.44	A	ip72-221-19-44.ph.ph.cox.net
72.221.19.101	A	ip72-221-19-101.ph.ph.cox.net
72.221.19.192	A+PTR	ip72-221-19-192.ph.ph.cox.net
72.221.19.250	A	ip72-221-19-250.ph.ph.cox.net
72.221.20.13	A	ip72-221-20-13.ph.ph.cox.net
72.221.20.106	A	ip72-221-20-106.ph.ph.cox.net
72.221.21.114	A+PTR	ip72-221-21-114.ph.ph.cox.net
72.221.21.199	PTR	ip72-221-21-199.ph.ph.cox.net
72.221.22.115	A+PTR	ip72-221-22-115.ph.ph.cox.net
72.221.24.219	A+PTR	ip72-221-24-219.ph.ph.cox.net
72.221.25.2	A+PTR	ip72-221-25-2.ph.ph.cox.net
72.221.26.10	A	ip72-221-26-10.ph.ph.cox.net
72.221.26.81	A	ip72-221-26-81.ph.ph.cox.net
72.221.26.84	A	ip72-221-26-84.ph.ph.cox.net
72.221.26.121	A	ip72-221-26-121.ph.ph.cox.net
72.221.28.101	A	ip72-221-28-101.ph.ph.cox.net
72.221.28.110	A	ex3b3k.com
72.221.28.216	A	ip72-221-28-216.ph.ph.cox.net
72.221.30.83	A	ip72-221-30-83.ph.ph.cox.net
72.221.30.188	A	ip72-221-30-188.ph.ph.cox.net
72.221.30.252	A	ip72-221-30-252.ph.ph.cox.net
72.221.31.20	A	peggycolemanphotography.com
72.221.31.20	A	mail.peggycolemanphotography.com
72.221.31.106	A	ip72-221-31-106.ph.ph.cox.net
72.221.31.145	A	ip72-221-31-145.ph.ph.cox.net
72.221.31.151	A	ip72-221-31-151.ph.ph.cox.net
72.221.31.159	A	ip72-221-31-159.ph.ph.cox.net