Robtex

Up: 72.128.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 72.128.128.0/18
Down right: 72.128.192.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.128.128.1	PTR	mta-72-128-128-1.kc.rr.com
72.128.128.106	A	vinosplace.com
72.128.132.6	A	popular-watch.com
72.128.132.6	A	dc-45d25e12267a.sacred.website
72.128.132.6	A	mail.waterintuitive.com
72.128.132.210	A+PTR	rrcs-72-128-132-210.sw.biz.rr.com
72.128.132.210	A	ns1.deluxsolutions.net
72.128.132.211	A+PTR	rrcs-72-128-132-211.sw.biz.rr.com
72.128.132.211	A	ns2.deluxsolutions.net
72.128.132.212	PTR	rrcs-72-128-132-212.sw.biz.rr.com
72.128.132.213	PTR	rrcs-72-128-132-213.sw.biz.rr.com
72.128.133.195	A+PTR	rrcs-72-128-133-195.sw.biz.rr.com
72.128.133.195	A	recyclingtimes.com
72.128.133.195	A	sellitzone.com
72.128.135.226	A	goodfaithenergy.com
72.128.139.178	A	rcwoolseylaw.com
72.128.143.27	A+PTR	rrcs-72-128-143-27.sw.biz.rr.com
72.128.147.114	A+PTR	rrcs-72-128-147-114.sw.biz.rr.com
72.128.149.74	A+PTR	rrcs-72-128-149-74.sw.biz.rr.com
72.128.149.74	A	mail.graydongroup.net
72.128.152.202	A+PTR	rrcs-72-128-152-202.sw.biz.rr.com
72.128.158.196	A+PTR	rrcs-72-128-158-196.sw.biz.rr.com
72.128.158.196	A	globalview.io
72.128.158.196	A	www.globalview.io
72.128.159.203	PTR	raw.thehippo.net
72.128.159.203	PTR	ra.thehippo.net
72.128.159.203	A	chszebras91.com
72.128.192.104	A+PTR	cpe-72-128-192-104.wi.res.rr.com
72.128.192.104	A	mail.pyronex.com
72.128.192.104	A	pyronex.com
72.128.192.197	A+PTR	cpe-72-128-192-197.wi.res.rr.com
72.128.193.32	PTR	cpe-72-128-193-32.wi.res.rr.com
72.128.196.1	A+PTR	cpe-72-128-196-1.wi.res.rr.com
72.128.196.3	A+PTR	cpe-72-128-196-3.wi.res.rr.com
72.128.196.6	A	cpe-72-128-196-6.wi.res.rr.com
72.128.196.7	A	cpe-72-128-196-7.wi.res.rr.com
72.128.196.128	PTR	cpe-72-128-196-128.wi.res.rr.com
72.128.196.129	A+PTR	cpe-72-128-196-129.wi.res.rr.com
72.128.196.130	A+PTR	cpe-72-128-196-130.wi.res.rr.com
72.128.196.131	A+PTR	cpe-72-128-196-131.wi.res.rr.com
72.128.196.132	A	cpe-72-128-196-132.wi.res.rr.com
72.128.197.23	A	cpe-72-128-197-23.wi.res.rr.com
72.128.197.236	A	tspringer.com
72.128.198.3	A+PTR	cpe-72-128-198-3.wi.res.rr.com
72.128.198.28	A+PTR	cpe-72-128-198-28.wi.res.rr.com
72.128.198.109	A+PTR	cpe-72-128-198-109.wi.res.rr.com
72.128.198.109	A	www.martino.cc
72.128.198.181	A+PTR	cpe-72-128-198-181.wi.res.rr.com
72.128.200.10	A+PTR	cpe-72-128-200-10.wi.res.rr.com
72.128.201.47	A+PTR	cpe-72-128-201-47.wi.res.rr.com
72.128.201.47	A	thhpro.com
72.128.201.176	A	jaredboulden.com
72.128.201.176	A	neuronfirestudios.com
72.128.201.176	A	lordimboard.com
72.128.202.15	A+PTR	cpe-72-128-202-15.wi.res.rr.com
72.128.202.203	PTR	cpe-72-128-202-203.wi.res.rr.com
72.128.202.203	A	newmail.blinkdraw.com
72.128.202.203	A	blinkdraw.com
72.128.203.222	A	cpe-72-128-203-222.wi.res.rr.com
72.128.205.66	A	cpe-72-128-205-66.wi.res.rr.com
72.128.206.50	PTR	cpe-72-128-206-50.wi.res.rr.com
72.128.207.46	A+PTR	cpe-72-128-207-46.wi.res.rr.com
72.128.207.46	A	palmsonic.net
72.128.207.227	PTR	cpe-72-128-207-227.wi.res.rr.com
72.128.208.62	PTR	cpe-72-128-208-62.wi.res.rr.com
72.128.208.62	A	wprcms.com
72.128.209.22	A	marketrealtygroup.com
72.128.210.81	PTR	cpe-72-128-210-81.wi.res.rr.com
72.128.210.81	A	remote.pyronex.com
72.128.213.115	A+PTR	cpe-72-128-213-115.wi.res.rr.com
72.128.214.161	A	cpe-72-128-214-161.wi.res.rr.com
72.128.215.0	A+PTR	cpe-72-128-215-0.wi.res.rr.com
72.128.215.2	A+PTR	cpe-72-128-215-2.wi.res.rr.com
72.128.215.6	A	cpe-72-128-215-6.wi.res.rr.com
72.128.215.9	A	cpe-72-128-215-9.wi.res.rr.com
72.128.215.129	A+PTR	cpe-72-128-215-129.wi.res.rr.com
72.128.215.138	A	cpe-72-128-215-138.wi.res.rr.com
72.128.215.144	A	cpe-72-128-215-144.wi.res.rr.com
72.128.215.145	A	cpe-72-128-215-145.wi.res.rr.com
72.128.219.156	A+PTR	cpe-72-128-219-156.wi.res.rr.com
72.128.220.16	A+PTR	cpe-72-128-220-16.wi.res.rr.com
72.128.222.95	A+PTR	cpe-72-128-222-95.wi.res.rr.com
72.128.222.116	PTR	cpe-72-128-222-116.wi.res.rr.com
72.128.222.251	A+PTR	cpe-72-128-222-251.wi.res.rr.com
72.128.238.129	PTR	mta-72-128-238-129.wi.rr.com
72.128.248.1	PTR	mta-72-128-248-1.wi.rr.com