Robtex

Up: 177.53.168.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 177.53.168.0/25
Down right: 177.53.168.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
177.53.168.6	PTR	site.alterna.com.br
177.53.168.6	A	www.alterna.com.br
177.53.168.6	A	intertecnologia.com.br
177.53.168.7	A+PTR	dns2.alterna.com.br
177.53.168.9	PTR	177-53-168-9.alterna.com.br
177.53.168.9	A	medidor.alterna.com.br