Robtex

Up: 189.7.192.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 189.7.193.0/25
Down right: 189.7.193.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
189.7.193.14	A+PTR	mail.silicium.com.br
189.7.193.14	A	ns1.silicium.com.br
189.7.193.14	A	externo.silicium.com.br
189.7.193.41	A+PTR	mail.alyaprime.com.br
189.7.193.53	PTR	bd07c135.virtua.com.br
189.7.193.53	A	mail2.comercialalfasig.com.br