Robtex

Up: 177.86.76.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 177.86.78.0/24
Down right: 177.86.79.0/24

IP	Type	Hostname
177.86.78.2	A+PTR	giga03.netwtelecom.com.br
177.86.79.2	A+PTR	giga04.netwtelecom.com.br
177.86.79.6	A+PTR	79-6.gfourtelecom.net.br
177.86.79.6	A	ns1.gfourtelecom.net.br
177.86.79.6	A	mx1.gfourtelecom.net.br
177.86.79.7	PTR	79-7.gfourtelecom.net.br
177.86.79.7	A	mx2.gfourtelecom.net.br
177.86.79.11	A	gfourtelecom.net.br
177.86.79.18	A+PTR	79-18.netwtelecom.com.br
177.86.79.78	A+PTR	79-78.netwtelecom.com.br