Robtex

Up: 64.20.246.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 64.20.247.0/25
Down right: 64.20.247.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.20.247.5	A+PTR	ns1.driftwooddns.net
64.20.247.5	A	storm33.login.skylist.net
64.20.247.6	A+PTR	ns2.driftwooddns.net
64.20.247.8	A+PTR	mail1.newsletter.hbo.com
64.20.247.8	A	*.newsletter.hbo.com
64.20.247.8	A	hostmaster.newsletter.hbo.com
64.20.247.10	A	mail3.newsletter.hbo.com
64.20.247.17	A	mail10.newsletter.hbo.com
64.20.247.19	PTR	mail12.newsletter.hbo.com
64.20.247.27	A+PTR	mail1.pga.preprod.net
64.20.247.29	A+PTR	mail1.hbo2.preprod.net
64.20.247.31	A+PTR	mail1.cnn.preprod.net
64.20.247.33	PTR	mail2.pcpowerscan-mail.com
64.20.247.33	A	pga.preprod.net
64.20.247.35	PTR	mail4.pcpowerscan-mail.com
64.20.247.35	A	hbo2.preprod.net
64.20.247.36	A	hbo.preprod.net
64.20.247.37	PTR	mail6.pcpowerscan-mail.com
64.20.247.37	A	cnn.preprod.net
64.20.247.64	A+PTR	mail3.access.cnn.com
64.20.247.65	A+PTR	mail4.access.cnn.com
64.20.247.66	A+PTR	mail5.access.cnn.com
64.20.247.69	A+PTR	mail8.access.cnn.com
64.20.247.69	A	mail2.access.cnn.com
64.20.247.69	A	mail1.access.cnn.com
64.20.247.161	PTR	mail4.access.nascar.com
64.20.247.161	A	mail1.access.nascar.com
64.20.247.161	A	*.access.nascar.com
64.20.247.167	A	mail10.access.nascar.com
64.20.247.208	PTR	click1.newsletter2.hbo.com
64.20.247.208	A	webmail.newsletter2.hbo.com
64.20.247.208	A	www.newsletter2.hbo.com
64.20.247.209	A+PTR	mail1.newsletter2.hbo.com
64.20.247.210	PTR	mail2.newsletter2.hbo.com
64.20.247.211	A+PTR	mail3.newsletter2.hbo.com
64.20.247.212	A+PTR	mail4.newsletter2.hbo.com
64.20.247.213	A+PTR	mail5.newsletter2.hbo.com
64.20.247.214	A+PTR	mail6.newsletter2.hbo.com
64.20.247.215	A+PTR	mail7.newsletter2.hbo.com
64.20.247.224	A+PTR	mail3.golf.pga.com
64.20.247.225	A+PTR	mail4.golf.pga.com
64.20.247.226	A+PTR	mail5.golf.pga.com
64.20.247.226	A	mail.golf.pga.com
64.20.247.226	A	mail1.golf.pga.com
64.20.247.228	A	mail7.golf.pga.com
64.20.247.230	A	mail9.golf.pga.com
64.20.247.231	A	mail10.golf.pga.com
64.20.247.233	A	mail12.golf.pga.com
64.20.247.234	A+PTR	mail13.golf.pga.com
64.20.247.239	A	mail18.golf.pga.com
64.20.247.254	A+PTR	mail1.preprod.net
64.20.247.254	A	*.preprod.net
64.20.247.254	A	hostmaster.preprod.net