Robtex

Up: 131.72.176.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 131.72.180.0/23
Down right: 131.72.182.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
131.72.180.3	A+PTR	3-180-72-131.computex.net.br
131.72.182.103	A+PTR	103-182-72-131.computex.net.br
131.72.183.146	A+PTR	ns1.computex.net.br
131.72.183.146	A	computex.net.br
131.72.183.146	A	net.computex.net.br
131.72.183.147	PTR	ns2.computex.net.br