Robtex

Up: 177.72.28.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 177.72.28.0/25
Down right: 177.72.28.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
177.72.28.10	PTR	mail.ncenternet.com.br
177.72.28.10	A	sp1.ncenternet.com.br
177.72.28.10	A	www.newcentertelecom.com.br
177.72.28.11	A+PTR	dns01ns02.ncenternet.com.br
177.72.28.11	A	ns2.ncenternet.com.br
177.72.28.14	A	mail.newcentertelecom.com.br
177.72.28.14	A	mail.ncenternet.com.br
177.72.28.73	PTR	177.72.28.73.dynamic.ncenternet.com.br
177.72.28.253	A+PTR	ip-177-72-28-253.dynamic.ncenternet.com.br