Robtex

Up: 204.75.64.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 204.75.64.0/25
Down right: 204.75.64.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.75.64.68	A	hqd-ra-01.corp.rhalf.com
204.75.64.80	PTR	vpndp.rhii.ca
204.75.64.80	PTR	vpndp.rhi.cl
204.75.64.80	PTR	vpndp.rhiglobal.cl
204.75.64.90	A	pulsar.rhi.com
204.75.64.149	A+PTR	ns3.rhalf.com
204.75.64.160	A+PTR	n2-s-1ext-xfr01.corp.rhalf.com