Robtex

Up: 200.6.40.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 200.6.41.0/25
Down right: 200.6.41.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
200.6.41.90	A+PTR	cerbero-1.faperj.br
200.6.41.94	A	cisco.faperj.br
200.6.41.100	A+PTR	caronte.faperj.br
200.6.41.100	A+PTR	mailhost.faperj.br
200.6.41.100	A+PTR	ns.faperj.br
200.6.41.120	A+PTR	www.faperj.br
200.6.41.120	A	faperj.br
200.6.41.126	A+PTR	cerbero-2.faperj.br