Robtex

Up: 64.23.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 64.23.128.0/22
Down right: 64.23.132.0/22

IP	Type	Hostname
64.23.135.17	PTR	unprovisioned.publicnet.net
64.23.135.34	PTR	unprovisioned.publicnet.net
64.23.135.67	PTR	unprovisioned.publicnet.net
64.23.135.74	PTR	unprovisioned.publicnet.net
64.23.135.81	PTR	unprovisioned.publicnet.net
64.23.135.120	PTR	unprovisioned.publicnet.net
64.23.135.121	PTR	unprovisioned.publicnet.net
64.23.135.123	PTR	unprovisioned.publicnet.net
64.23.135.144	PTR	host.scfundamental.com
64.23.135.163	PTR	host.scfundamental.com
64.23.135.193	PTR	host.scfundamental.com
64.23.135.225	PTR	unprovisioned.publicnet.net
64.23.135.240	PTR	unprovisioned.publicnet.net
64.23.135.248	PTR	unprovisioned.publicnet.net
64.23.135.249	PTR	unprovisioned.publicnet.net
64.23.135.250	PTR	unprovisioned.publicnet.net