Robtex

Up: 177.73.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 177.73.72.0/23
Down right: 177.73.74.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
177.73.72.213	A+PTR	mail.avgflorestal.net.br
177.73.72.213	A	mail.ifg.ind.br
177.73.72.213	A	avgflorestal.net.br
177.73.73.183	PTR	mail.unifemm.com.br
177.73.73.183	A	ns1.r2v2.com.br
177.73.73.183	A	www.unifemm.com.br
177.73.74.98	A+PTR	mail.netwaytecnologia.com.br
177.73.74.98	A	ns1.netwaytecnologia.com.br
177.73.74.98	A	i7net.com.br
177.73.74.134	A	supersantahelena.ddns.net
177.73.75.2	A+PTR	conecta.link7.net.br
177.73.75.2	A	link7.net.br
177.73.75.2	A	ns.link7.net.br
177.73.75.5	A	sp1.link7.net.br
177.73.75.6	PTR	ns2.link7.net.br
177.73.75.6	A	link7.net.br
177.73.75.13	A+PTR	monitor.link7.net.br
177.73.75.251	A	dns2.link7.net.br