Robtex

Up: 179.234.216.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 179.234.216.0/23
Down right: 179.234.218.0/23

IP	Type	Hostname
179.234.217.24	PTR	b3ead918.virtua.com.br
179.234.217.32	PTR	b3ead920.virtua.com.br
179.234.217.53	PTR	b3ead935.virtua.com.br
179.234.217.59	PTR	b3ead93b.virtua.com.br
179.234.217.61	PTR	b3ead93d.virtua.com.br
179.234.217.98	PTR	b3ead962.virtua.com.br
179.234.217.123	PTR	b3ead97b.virtua.com.br
179.234.217.180	PTR	b3ead9b4.virtua.com.br
179.234.217.187	PTR	b3ead9bb.virtua.com.br
179.234.217.213	PTR	b3ead9d5.virtua.com.br
179.234.217.218	PTR	b3ead9da.virtua.com.br
179.234.217.238	PTR	b3ead9ee.virtua.com.br
179.234.218.205	PTR	b3eadacd.virtua.com.br