Robtex

Up: 177.39.80.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 177.39.80.0/25
Down right: 177.39.80.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
177.39.80.5	A	ns1.marroart.com.br
177.39.80.5	A	ns1.vipsnet.com.br
177.39.80.5	A	ns1.lidernetprovedor.com.br
177.39.80.6	A	ns2.vipsnet.com.br
177.39.80.6	A	ns2.lidernetprovedor.com.br
177.39.80.7	A+PTR	mx.vipsnet.com.br
177.39.80.15	PTR	ns4.vipsnet.com.br
177.39.80.15	A	mx.vipsnet.com.br
177.39.80.15	A	valentimgentil.sp.gov.br
177.39.80.16	A	ns5.vipsnet.com.br