Robtex

Up: 64.185.46.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 64.185.47.0/25
Down right: 64.185.47.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.185.47.5	PTR	nts-5.47-185-64.static.nts-online.net
64.185.47.9	PTR	nts-9.47-185-64.static.nts-online.net
64.185.47.28	PTR	nts-28.47-185-64.static.nts-online.net
64.185.47.30	PTR	nts-30.47-185-64.static.nts-online.net
64.185.47.49	PTR	nts-49.47-185-64.static.nts-online.net
64.185.47.73	PTR	mail2.tradetechnologies.com
64.185.47.82	A	switchitsupport.com
64.185.47.83	PTR	nts-83.47-185-64.static.nts-online.net
64.185.47.85	PTR	nts-85.47-185-64.static.nts-online.net
64.185.47.85	A	texas-speed.com
64.185.47.94	PTR	nts-94.47-185-64.static.nts-online.net
64.185.47.112	PTR	nts-112.47-185-64.static.nts-online.net
64.185.47.123	PTR	nts-123.47-185-64.static.nts-online.net
64.185.47.125	PTR	nts-125.47-185-64.static.nts-online.net
64.185.47.156	PTR	ns1.sitp.net
64.185.47.157	A	mail1.sitp.net
64.185.47.161	PTR	nts-161.47-185-64.static.nts-online.net
64.185.47.164	PTR	mail.extremepackets.com
64.185.47.164	A	*.extremepackets.com
64.185.47.164	A	extremedots.net
64.185.47.165	A	ns2.extremepackets.com
64.185.47.167	PTR	nts-167.47-185-64.static.nts-online.net
64.185.47.174	PTR	nts-174.47-185-64.static.nts-online.net
64.185.47.179	PTR	nts-179.47-185-64.static.nts-online.net
64.185.47.199	PTR	nts-199.47-185-64.static.nts-online.net
64.185.47.212	PTR	nts-212.47-185-64.static.nts-online.net
64.185.47.220	PTR	nts-220.47-185-64.static.nts-online.net
64.185.47.229	PTR	nts-229.47-185-64.static.nts-online.net
64.185.47.238	PTR	nts-238.47-185-64.static.nts-online.net
64.185.47.240	PTR	nts-240.47-185-64.static.nts-online.net