Robtex

Up: 131.100.72.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 131.100.72.0/25
Down right: 131.100.72.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
131.100.72.74	A+PTR	mail.donda.com.br
131.100.72.74	A	ddcinformatica.com.br
131.100.72.74	A	donda.com.br
131.100.72.75	PTR	ns1.donda.com.br
131.100.72.75	A	mail2.donda.com.br
131.100.72.76	A	ns2.donda.com.br
131.100.72.78	A	ddcinformatica.com.br
131.100.72.92	A+PTR	acontabil.acontabil.com.br
131.100.72.92	A	sexshopworld.com.br
131.100.72.92	A	wordsexshop.com.br
131.100.72.93	A+PTR	acontabil2.acontabil.com.br