Robtex

Up: 204.75.80.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 204.75.80.0/25
Down right: 204.75.80.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.75.80.150	A	mail2.rhcity.net
204.75.80.155	A+PTR	ns3.rhi.com
204.75.80.156	A+PTR	ns4.rhi.com
204.75.80.165	A	timesheets.protiviti.com
204.75.80.166	A	online.rhi.net
204.75.80.167	A+PTR	online.roberthalf.net
204.75.80.181	A+PTR	ukmail.rhi.com
204.75.80.182	A+PTR	ukmail.rhi.com
204.75.80.182	A+PTR	ukmail.rhi.net
204.75.80.183	A	sm.rhi.net
204.75.80.185	PTR	roberthalf.lt
204.75.80.185	PTR	rhi.ie
204.75.80.185	PTR	officeteam.ru
204.75.80.191	A+PTR	backup1.rhi.net
204.75.80.205	A	izowa.rhi.net
204.75.80.205	A	legacy.rhi.net
204.75.80.205	A	webmail.roberthalf.net
204.75.80.207	A	tn.roberthalf.de