Robtex

Up: 71.72.0.0/15
Can't show all results, try to descend to a more specific CIDR
Down left: 71.73.0.0/17
Down right: 71.73.128.0/17
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
71.73.0.195	PTR	mta-71-73-0-195.neo.rr.com
71.73.2.99	PTR	mta-71-73-2-99.neo.rr.com
71.73.2.99	A	sscinc.dyndns.org
71.73.2.204	PTR	mta-71-73-2-204.neo.rr.com
71.73.2.204	A	cardinaltec.com
71.73.4.227	PTR	mta-71-73-4-227.neo.rr.com
71.73.8.81	PTR	mta-71-73-8-81.neo.rr.com
71.73.8.81	A	crysalis.net
71.73.8.118	PTR	mta-71-73-8-118.neo.rr.com
71.73.8.118	A	kali-krishna.com
71.73.11.222	PTR	mta-71-73-11-222.neo.rr.com
71.73.11.222	A	cardinaltec.net
71.73.13.98	PTR	mta-71-73-13-98.neo.rr.com
71.73.15.2	PTR	mta-71-73-15-2.neo.rr.com
71.73.18.2	PTR	voip-71-73-18-2.neo.rr.com
71.73.18.32	A	electrumx.alexridevski.net
71.73.20.118	A	draptek.com
71.73.21.0	PTR	mta-71-73-21-0.neo.rr.com
71.73.22.0	PTR	mta-71-73-22-0.neo.rr.com
71.73.22.2	PTR	mta-71-73-22-2.neo.rr.com
71.73.29.10	A	durrsconstructions.com
71.73.29.10	A	victert.com
71.73.29.10	A	mydaxfort.com
71.73.35.149	PTR	mta-71-73-35-149.neo.rr.com
71.73.35.149	A	joshkrajnak.com
71.73.36.2	PTR	voip-71-73-36-2.neo.rr.com
71.73.36.37	PTR	mta-71-73-36-37.neo.rr.com
71.73.37.2	PTR	mta-71-73-37-2.neo.rr.com
71.73.38.121	PTR	mta-71-73-38-121.neo.rr.com
71.73.38.121	A	marquardhouse.com
71.73.44.110	PTR	mta-71-73-44-110.neo.rr.com
71.73.45.41	PTR	mta-71-73-45-41.neo.rr.com
71.73.45.56	PTR	mta-71-73-45-56.neo.rr.com
71.73.45.57	PTR	mta-71-73-45-57.neo.rr.com
71.73.45.61	PTR	mta-71-73-45-61.neo.rr.com
71.73.47.41	PTR	mta-71-73-47-41.neo.rr.com
71.73.47.57	PTR	mta-71-73-47-57.neo.rr.com
71.73.52.249	PTR	mta-71-73-52-249.neo.rr.com
71.73.67.36	PTR	mta-71-73-67-36.columbus.rr.com
71.73.67.244	PTR	mta-71-73-67-244.columbus.rr.com
71.73.67.244	A	coreaddress.com
71.73.69.253	PTR	mta-71-73-69-253.columbus.rr.com
71.73.69.253	A	pchom.me
71.73.70.56	PTR	mta-71-73-70-56.columbus.rr.com
71.73.70.224	PTR	mta-71-73-70-224.columbus.rr.com
71.73.70.224	A	phileportal.com
71.73.72.2	PTR	mta-71-73-72-2.columbus.rr.com
71.73.72.2	A	cpr-1.dyndns.org
71.73.76.101	PTR	mta-71-73-76-101.columbus.rr.com
71.73.76.101	A	robinsontechnologies.net
71.73.81.208	PTR	mta-71-73-81-208.columbus.rr.com
71.73.81.208	A	www.great-photos.net
71.73.81.208	A	fiorelli.org
71.73.84.20	PTR	mta-71-73-84-20.columbus.rr.com
71.73.84.20	A	slimanstore.com
71.73.88.3	PTR	mta-71-73-88-3.columbus.rr.com
71.73.103.231	PTR	mta-71-73-103-231.columbus.rr.com
71.73.103.231	A	saturdaybang.org
71.73.106.99	PTR	mta-71-73-106-99.columbus.rr.com
71.73.111.16	PTR	mta-71-73-111-16.columbus.rr.com
71.73.111.16	A	legitwebsite.net
71.73.115.23	PTR	mta-71-73-115-23.columbus.rr.com
71.73.115.23	A	kuniklido.net
71.73.133.54	PTR	mta-71-73-133-54.cinci.rr.com
71.73.149.3	PTR	mta-71-73-149-3.cinci.rr.com
71.73.163.80	PTR	mta-71-73-163-80.cinci.rr.com
71.73.191.55	PTR	mta-71-73-191-55.cinci.rr.com
71.73.212.37	PTR	mta-71-73-212-37.cinci.rr.com
71.73.244.1	PTR	mta-71-73-244-1.neo.rr.com
71.73.245.0	PTR	mta-71-73-245-0.neo.rr.com
71.73.245.3	PTR	mta-71-73-245-3.neo.rr.com