Robtex

Up: 177.35.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 177.35.136.0/22
Down right: 177.35.140.0/22

IP	Type	Hostname
177.35.136.136	PTR	b1238888.virtua.com.br
177.35.138.130	PTR	b1238a82.virtua.com.br
177.35.138.136	PTR	b1238a88.virtua.com.br
177.35.138.138	PTR	b1238a8a.virtua.com.br
177.35.138.139	PTR	b1238a8b.virtua.com.br
177.35.138.154	PTR	b1238a9a.virtua.com.br
177.35.138.170	PTR	b1238aaa.virtua.com.br
177.35.138.202	PTR	b1238aca.virtua.com.br
177.35.138.234	PTR	b1238aea.virtua.com.br
177.35.140.138	PTR	b1238c8a.virtua.com.br
177.35.140.235	PTR	b1238ceb.virtua.com.br
177.35.141.195	PTR	b1238dc3.virtua.com.br
177.35.142.72	PTR	b1238e48.virtua.com.br
177.35.142.138	PTR	b1238e8a.virtua.com.br