Robtex

Up: 189.89.160.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 189.89.168.0/22
Down right: 189.89.172.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
189.89.168.138	PTR	189-89-168-138.static.itsweb.com.br
189.89.168.169	PTR	189-89-168-169.static.itsweb.com.br
189.89.168.169	A	mail.icpnet.com.br
189.89.168.170	PTR	189-89-168-170.static.itsweb.com.br
189.89.168.170	A	ns1.icpnet.com.br
189.89.168.170	A	ns3.cardiopulmonar.com.br
189.89.169.2	PTR	ns3.ferbasa.com.br
189.89.169.2	A	ferbasa.com.br
189.89.169.3	PTR	ns4.ferbasa.com.br
189.89.169.34	PTR	189-89-169-34.static.itsweb.com.br
189.89.169.230	A	www.cetrel.com.br
189.89.171.69	A	ctmnet.com.br
189.89.173.25	PTR	189-89-173-25.static.itsweb.com.br
189.89.174.2	A	dufarma.com