Robtex

Up: 177.124.184.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 177.124.188.0/23
Down right: 177.124.190.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
177.124.188.0	PTR	177.124.188.0.static.brnet.net.br
177.124.188.1	A	dns-brs01.brnet.net.br
177.124.188.4	PTR	177.124.188.4.static.brnet.net.br
177.124.188.4	A	dns-brs02.brnet.net.br
177.124.188.20	A+PTR	poseidon.brnet.net.br
177.124.188.21	PTR	hera.brnet.net.br
177.124.188.21	PTR	ns1.brnet.net.br
177.124.188.21	A	acibomretiro.com.br
177.124.188.22	PTR	hefesto.brnet.net.br
177.124.188.22	PTR	ns2.brnet.net.br
177.124.188.23	PTR	177.124.188.23.static.brnet.net.br
177.124.188.23	A	mailserver.brnet.net.br
177.124.188.23	A	mx.brnet.net.br
177.124.188.24	A+PTR	dionisio.brnet.net.br
177.124.188.24	PTR	mx2.brnet.net.br
177.124.188.24	A	mailserver.brnet.net.br
177.124.188.229	PTR	ns1.brnet.net.br
177.124.188.229	A	brnet.net.br
177.124.188.229	A	acertecom.com
177.124.188.230	PTR	ns2.brnet.net.br
177.124.188.231	A+PTR	mx.brnet.net.br
177.124.188.232	A+PTR	mx2.brnet.net.br
177.124.188.233	A+PTR	web.brnet.net.br
177.124.188.233	A	web.turbobrnet.com.br
177.124.188.233	A	astroempires.turbobrnet.com.br
177.124.188.255	PTR	dns-brs01.brnet.net.br
177.124.188.255	A	brnet.net.br
177.124.188.255	A	turbobrnet.com.br
177.124.190.255	PTR	177.124.190.255.static.brnet.net.br
177.124.191.101	PTR	177.124.191.101.static.brnet.net.br
177.124.191.110	PTR	177.124.191.110.static.brnet.net.br
177.124.191.130	PTR	177.124.191.130.static.brnet.net.br
177.124.191.138	PTR	177.124.191.138.static.brnet.net.br
177.124.191.144	PTR	177.124.191.144.static.brnet.net.br
177.124.191.192	PTR	177.124.191.192.static.brnet.net.br
177.124.191.202	PTR	177.124.191.202.static.brnet.net.br
177.124.191.226	PTR	177.124.191.226.static.brnet.net.br
177.124.191.227	PTR	177.124.191.227.static.brnet.net.br
177.124.191.254	PTR	177.124.191.254.static.brnet.net.br
177.124.191.255	PTR	proxserv-brs.brnet.net.br