Robtex

Up: 131.72.96.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 131.72.96.0/24
Down right: 131.72.97.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
131.72.96.2	A+PTR	2-96-72-131.orixinet.com.br
131.72.96.4	PTR	4-96-72-131.orixinet.com.br
131.72.96.111	A+PTR	111-96-72-131.orixinet.com.br
131.72.96.228	A+PTR	228-96-72-131.orixinet.com.br
131.72.97.0	A	0-97-72-131.orixinet.com.br
131.72.97.2	A+PTR	ns1.orixinet.com.br
131.72.97.2	A	mail.orixinet.com.br
131.72.97.2	A	orixinet.com.br
131.72.97.3	PTR	ns2.orixinet.com.br