Robtex

Up: 187.106.160.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 187.106.160.0/23
Down right: 187.106.162.0/23

IP	Type	Hostname
187.106.161.204	PTR	bb6aa1cc.virtua.com.br
187.106.162.239	PTR	bb6aa2ef.virtua.com.br
187.106.163.28	PTR	bb6aa31c.virtua.com.br
187.106.163.50	PTR	bb6aa332.virtua.com.br
187.106.163.239	PTR	bb6aa3ef.virtua.com.br