Robtex

Up: 177.152.224.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 177.152.224.0/22
Down right: 177.152.228.0/22

IP	Type	Hostname
177.152.225.0	PTR	mta01.getmailmta.com.br
177.152.225.32	PTR	mta33.getmailmta.com.br
177.152.228.224	A	mta01.dovallemta.com
177.152.229.22	A	mta07.npnipost.com
177.152.231.0	A	mta01.akcomp.com.br
177.152.231.1	A	mta02.akcomp.com.br