Robtex

Up: 64.140.80.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 64.140.80.0/22
Down right: 64.140.84.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.140.81.66	PTR	tpmms1.tpmllclaw.com
64.140.81.150	A	relay2.clairedineenlaw.com
64.140.81.194	PTR	mail.envisionco.org
64.140.81.235	PTR	mail.sundialscheduling.com
64.140.81.235	A	mail.turbodesigns.net
64.140.82.1	PTR	drake-tech-centre.mbi.com
64.140.82.10	PTR	64-140-82-10.host.mbi.com
64.140.82.16	PTR	64-140-82-16.host.mbi.com
64.140.82.17	PTR	64-140-82-17.host.mbi.com
64.140.82.33	PTR	64-140-82-33.host.mbi.com
64.140.82.35	PTR	64-140-82-35.host.mbi.com
64.140.82.41	PTR	64-140-82-41.host.mbi.com
64.140.82.43	PTR	64-140-82-43.host.mbi.com
64.140.82.49	PTR	64-140-82-49.host.mbi.com
64.140.82.51	PTR	64-140-82-51.host.mbi.com
64.140.82.98	PTR	mail.sca-ins.com
64.140.82.228	PTR	mainmaker.promote-it.com
64.140.82.238	PTR	vpn.promote-it.com
64.140.83.30	PTR	rifkin-wo79.edge1.denver1.level3.net
64.140.83.194	PTR	ns1.pcmedicalllc.com
64.140.83.222	PTR	ns2.pcmedicalllc.com
64.140.84.89	PTR	t1-3-2-0-9-27.edge1.cincinnati1.level3.net
64.140.84.121	A	advancedmerchantservices.com
64.140.85.2	PTR	mail.ctgusa.com
64.140.85.3	PTR	mail.bfca.com
64.140.85.98	PTR	mail.lovante.com
64.140.85.227	PTR	mail.mimvista.com
64.140.85.228	A	csitko.yi.org
64.140.86.75	A	mail.veracept.com
64.140.86.75	A	mail.regionalimaging.com
64.140.86.75	A	veracept.com