Robtex

Up: 177.82.24.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 177.82.28.0/23
Down right: 177.82.30.0/23

IP	Type	Hostname
177.82.30.123	PTR	b1521e7b.virtua.com.br
177.82.30.123	A	veronz.com
177.82.30.211	PTR	b1521ed3.virtua.com.br
177.82.30.211	A	mail.rhhsm.net.br
177.82.31.16	PTR	b1521f10.virtua.com.br
177.82.31.37	PTR	b1521f25.virtua.com.br