Robtex

Up: 177.35.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 177.35.12.0/23
Down right: 177.35.14.0/23

IP	Type	Hostname
177.35.13.51	PTR	b1230d33.virtua.com.br
177.35.13.57	PTR	b1230d39.virtua.com.br
177.35.13.82	PTR	b1230d52.virtua.com.br
177.35.15.2	PTR	b1230f02.virtua.com.br
177.35.15.31	PTR	b1230f1f.virtua.com.br
177.35.15.255	PTR	b1230fff.virtua.com.br