Robtex

Up: 177.82.128.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 177.82.132.0/23
Down right: 177.82.134.0/23

IP	Type	Hostname
177.82.132.21	PTR	b1528415.virtua.com.br
177.82.132.80	PTR	b1528450.virtua.com.br
177.82.134.15	PTR	b152860f.virtua.com.br
177.82.134.198	PTR	b15286c6.virtua.com.br
177.82.135.218	PTR	b15287da.virtua.com.br