Robtex

Up: 170.0.136.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 170.0.136.0/24
Down right: 170.0.137.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
170.0.136.10	A+PTR	mail.zrl.net.br
170.0.136.10	A	mail.zrlnet.com.br
170.0.136.11	A+PTR	ns1.zrl.net.br
170.0.136.12	A+PTR	ns2.zrl.net.br
170.0.136.20	A+PTR	admin.zrl.net.br
170.0.136.20	A	zrlnet.com.br
170.0.136.20	A	zrl.net.br
170.0.136.40	PTR	170.0.136.40.zrl.net.br
170.0.136.40	A	santanatower2.com
170.0.136.118	A+PTR	170-0-136-118.static.zrl.net.br