Robtex

Up: 177.74.64.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 177.74.66.0/24
Down right: 177.74.67.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
177.74.66.3	PTR	dev.gnx.com.br
177.74.66.3	A	mail.dros.com.br
177.74.66.3	A	server1.dros.com.br
177.74.66.23	A+PTR	mail2.cergal.com.br
177.74.66.37	PTR	gea.pro.br
177.74.66.37	A	imobiliariafonseca.com.br
177.74.66.64	PTR	moradv.com.br