Robtex

Up: 8.21.150.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 8.21.151.0/25
Down right: 8.21.151.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
8.21.151.6	PTR	mail2.rscs.com
8.21.151.6	A	mail2.ufpc.com
8.21.151.6	A	mail2.ufpcequipmentsales.com
8.21.151.42	PTR	rscs.com
8.21.151.42	PTR	acs.rscs.com
8.21.151.42	PTR	aip.rscs.com
8.21.151.51	A	apps.ufpc.com