Robtex

Up: 179.234.192.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 179.234.208.0/21
Down right: 179.234.216.0/21

IP	Type	Hostname
179.234.208.146	PTR	b3ead092.virtua.com.br
179.234.208.179	PTR	b3ead0b3.virtua.com.br
179.234.209.176	PTR	b3ead1b0.virtua.com.br
179.234.210.177	PTR	b3ead2b1.virtua.com.br
179.234.211.67	PTR	b3ead343.virtua.com.br
179.234.211.96	PTR	b3ead360.virtua.com.br
179.234.217.32	PTR	b3ead920.virtua.com.br
179.234.217.98	PTR	b3ead962.virtua.com.br
179.234.221.243	PTR	b3eaddf3.virtua.com.br