Robtex

Up: 65.51.172.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 65.51.172.0/25
Down right: 65.51.172.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
65.51.172.62	A+PTR	4133ac3e.cst.lightpath.net
65.51.172.62	A	mail.valrouge.com
65.51.172.74	A	razgate.net
65.51.172.74	A	smtp.sigbop.net
65.51.172.74	A	mail.razgate.net
65.51.172.76	A+PTR	mail.imanagedservices.com
65.51.172.79	A	mail.touchbasetel.com
65.51.172.82	A	mail.onetouchcom.com
65.51.172.88	A+PTR	mail.surftone.com