Robtex

Up: 191.37.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 191.37.128.0/22
Down right: 191.37.132.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
191.37.134.80	A	ceinee.org.br
191.37.135.152	PTR	cyber-135-host-152.cybertechnet.com.br
191.37.135.242	A+PTR	ns1.cybertechnet.com.br
191.37.135.242	A	mail.alumax.com.br
191.37.135.242	A	ns1.hospitaltherezamussi.com.br