Robtex

Up: 177.23.32.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 177.23.32.0/23
Down right: 177.23.34.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
177.23.32.2	A+PTR	intranet.print.com.br
177.23.32.2	PTR	ns1.print.com.br
177.23.32.2	A	oceano.print.com.br
177.23.32.3	A+PTR	ns2.print.com.br
177.23.32.6	A	ns2.print.com.br
177.23.34.1	A+PTR	base.print.com.br
177.23.34.17	A+PTR	177-23-34-17.print.com.br