Robtex

Up: 72.135.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 72.135.16.0/21
Down right: 72.135.24.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.135.16.2	A+PTR	cpe-72-135-16-2.kc.res.rr.com
72.135.17.84	A	christopherrswope.com
72.135.17.214	A	cpe-72-135-17-214.kc.res.rr.com
72.135.18.2	A+PTR	cpe-72-135-18-2.kc.res.rr.com
72.135.18.50	A+PTR	cpe-72-135-18-50.kc.res.rr.com
72.135.18.50	A	zimmsoftware.com
72.135.18.114	A+PTR	cpe-72-135-18-114.kc.res.rr.com
72.135.19.52	A	cpe-72-135-19-52.kc.res.rr.com
72.135.19.97	A	cpe-72-135-19-97.kc.res.rr.com
72.135.20.98	PTR	cpe-72-135-20-98.kc.res.rr.com
72.135.20.98	A	2.lpowellus.com
72.135.20.176	A+PTR	cpe-72-135-20-176.kc.res.rr.com
72.135.20.187	A	cpe-72-135-20-187.kc.res.rr.com
72.135.20.218	A	cpe-72-135-20-218.kc.res.rr.com
72.135.23.75	A+PTR	cpe-72-135-23-75.kc.res.rr.com
72.135.23.75	A	blogwoods.net
72.135.23.174	A+PTR	cpe-72-135-23-174.kc.res.rr.com
72.135.23.174	A	ajgomezmusic.com
72.135.24.44	A	ogretech.com
72.135.24.116	A+PTR	cpe-72-135-24-116.kc.res.rr.com
72.135.24.117	PTR	cpe-72-135-24-117.kc.res.rr.com
72.135.24.117	A	mail.teamci.org
72.135.24.167	A+PTR	cpe-72-135-24-167.kc.res.rr.com
72.135.24.233	A+PTR	cpe-72-135-24-233.kc.res.rr.com
72.135.24.233	A	snackerdog.com
72.135.24.233	A	artizt.com
72.135.25.20	A+PTR	cpe-72-135-25-20.kc.res.rr.com
72.135.25.22	A+PTR	cpe-72-135-25-22.kc.res.rr.com
72.135.25.77	A+PTR	cpe-72-135-25-77.kc.res.rr.com
72.135.26.184	A	cpe-72-135-26-184.kc.res.rr.com
72.135.27.188	A+PTR	cpe-72-135-27-188.kc.res.rr.com
72.135.28.2	A+PTR	cpe-72-135-28-2.kc.res.rr.com
72.135.28.51	A+PTR	cpe-72-135-28-51.kc.res.rr.com
72.135.28.231	A+PTR	cpe-72-135-28-231.kc.res.rr.com
72.135.29.4	A	scabadeba.com
72.135.29.19	A+PTR	cpe-72-135-29-19.kc.res.rr.com
72.135.29.22	A	cpe-72-135-29-22.kc.res.rr.com
72.135.30.84	PTR	cpe-72-135-30-84.kc.res.rr.com
72.135.30.156	A+PTR	cpe-72-135-30-156.kc.res.rr.com
72.135.31.84	PTR	cpe-72-135-31-84.kc.res.rr.com
72.135.31.84	A	acropath.net
72.135.31.97	A+PTR	cpe-72-135-31-97.kc.res.rr.com
72.135.31.113	A+PTR	cpe-72-135-31-113.kc.res.rr.com
72.135.31.251	A+PTR	cpe-72-135-31-251.kc.res.rr.com
72.135.31.255	A	cpe-72-135-31-255.kc.res.rr.com