Robtex

Up: 72.131.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 72.131.32.0/20
Down right: 72.131.48.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.131.32.103	A	cpe-72-131-32-103.wi.res.rr.com
72.131.32.212	PTR	cpe-72-131-32-212.wi.res.rr.com
72.131.32.212	A	smtp.moulas.com
72.131.32.212	A	ns4.moulas.com
72.131.34.159	PTR	cpe-72-131-34-159.wi.res.rr.com
72.131.34.165	PTR	cpe-72-131-34-165.wi.res.rr.com
72.131.36.2	PTR	cpe-72-131-36-2.wi.res.rr.com
72.131.37.31	A+PTR	cpe-72-131-37-31.wi.res.rr.com
72.131.37.31	A	rbanks.me
72.131.38.95	A+PTR	cpe-72-131-38-95.wi.res.rr.com
72.131.38.95	A	taylorwidmayer.com
72.131.38.155	A	mail2.dobrinska.com
72.131.38.174	A	mail.mwebercloud.com
72.131.39.56	PTR	cpe-72-131-39-56.wi.res.rr.com
72.131.39.56	A	dbusse.no-ip.org
72.131.39.70	A+PTR	cpe-72-131-39-70.wi.res.rr.com
72.131.39.70	A	drdarci.com
72.131.39.89	A+PTR	cpe-72-131-39-89.wi.res.rr.com
72.131.40.150	A	cpe-72-131-40-150.wi.res.rr.com
72.131.40.150	A	ebbsnet.net
72.131.41.118	PTR	cpe-72-131-41-118.wi.res.rr.com
72.131.41.183	A+PTR	cpe-72-131-41-183.wi.res.rr.com
72.131.41.183	A	markandpatricia.com
72.131.41.214	A	cpe-72-131-41-214.wi.res.rr.com
72.131.41.220	A+PTR	cpe-72-131-41-220.wi.res.rr.com
72.131.42.10	A	midwestcompsol.net
72.131.42.85	A	stpetersschoolet.org
72.131.43.62	A+PTR	cpe-72-131-43-62.wi.res.rr.com
72.131.43.167	A	mail.swiderski.org
72.131.43.167	A	swiderski.org
72.131.44.98	A	mail.vponytails.com
72.131.44.190	PTR	cpe-72-131-44-190.wi.res.rr.com
72.131.45.27	A+PTR	cpe-72-131-45-27.wi.res.rr.com
72.131.45.191	A+PTR	cpe-72-131-45-191.wi.res.rr.com
72.131.46.191	PTR	cpe-72-131-46-191.wi.res.rr.com
72.131.47.66	PTR	cpe-72-131-47-66.wi.res.rr.com
72.131.48.196	A	cpe-72-131-48-196.wi.res.rr.com
72.131.50.1	A	dboyles.net
72.131.50.15	A+PTR	cpe-72-131-50-15.wi.res.rr.com
72.131.50.120	A+PTR	cpe-72-131-50-120.wi.res.rr.com
72.131.50.252	A	remote.johnchiodo.net
72.131.51.153	A+PTR	cpe-72-131-51-153.wi.res.rr.com
72.131.52.47	A	cpe-72-131-52-47.wi.res.rr.com
72.131.52.74	A+PTR	cpe-72-131-52-74.wi.res.rr.com
72.131.52.201	A+PTR	cpe-72-131-52-201.wi.res.rr.com
72.131.52.201	A	mundschau.net
72.131.53.8	A+PTR	cpe-72-131-53-8.wi.res.rr.com
72.131.53.57	A+PTR	cpe-72-131-53-57.wi.res.rr.com
72.131.53.57	A	gummyfortress.info
72.131.53.205	A+PTR	cpe-72-131-53-205.wi.res.rr.com
72.131.53.250	PTR	cpe-72-131-53-250.wi.res.rr.com
72.131.54.57	A+PTR	cpe-72-131-54-57.wi.res.rr.com
72.131.55.70	A	cpe-72-131-55-70.wi.res.rr.com
72.131.56.44	A	redpaux.org
72.131.57.50	A	edgarware.com
72.131.57.86	A+PTR	cpe-72-131-57-86.wi.res.rr.com
72.131.57.157	A+PTR	cpe-72-131-57-157.wi.res.rr.com
72.131.57.157	A	beasly.com
72.131.57.157	A	scootrx.com
72.131.59.27	A+PTR	cpe-72-131-59-27.wi.res.rr.com
72.131.63.148	A+PTR	cpe-72-131-63-148.wi.res.rr.com
72.131.63.157	A	lewsoft.com