Robtex

Up: 177.73.0.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 177.73.8.0/22
Down right: 177.73.12.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
177.73.8.0	PTR	177-73-8-0.hipernet.inf.br
177.73.8.6	A+PTR	177-73-8-6.hipernet.inf.br
177.73.8.22	A+PTR	177-73-8-22.hipernet.inf.br
177.73.8.42	A+PTR	177-73-8-42.hipernet.inf.br
177.73.8.198	A+PTR	177-73-8-198.hipernet.inf.br
177.73.8.230	PTR	177-73-8-230.hipernet.inf.br
177.73.10.12	A+PTR	177-73-10-12.hipernet.inf.br
177.73.10.12	A	r1.sn-ip2xgoxucg-h84e.gvt1.com
177.73.10.12	A	r1---sn-ip2xgoxucg-h84e.googlevideo.com
177.73.10.13	PTR	177-73-10-13.hipernet.inf.br
177.73.10.14	PTR	177-73-10-14.hipernet.inf.br
177.73.10.97	A+PTR	177-73-10-97.hipernet.inf.br
177.73.10.97	A	instagram.fmvf3-1.fna.fbcdn.net
177.73.10.210	PTR	177-73-10-210.hipernet.inf.br
177.73.10.210	A	occ-2-2223-1567.1.nflxso.net
177.73.10.210	A	ipv4-c001-mvf001-hipernet-isp.1.oca.nflxvideo.net
177.73.10.211	A	occ-2-2223-1567.1.nflxso.net
177.73.10.211	A	occ-2-2223-1123.1.nflxso.net
177.73.10.227	A+PTR	177-73-10-227.hipernet.inf.br
177.73.10.227	A	speedtest.hipernet.inf.br
177.73.10.229	A+PTR	177-73-10-229.hipernet.inf.br
177.73.10.232	A+PTR	177-73-10-232.hipernet.inf.br
177.73.10.232	A	mail.hipernet.inf.br
177.73.10.232	A	www.hipernet.inf.br
177.73.10.233	A	ns1.hipernet.inf.br
177.73.10.234	PTR	177-73-10-234.hipernet.inf.br
177.73.12.102	A	177-73-12-102.hipernet.inf.br
177.73.13.71	A	177-73-13-71.hipernet.inf.br
177.73.15.84	A+PTR	177-73-15-84.hipernet.inf.br
177.73.15.184	A+PTR	177-73-15-184.hipernet.inf.br
177.73.15.255	A+PTR	177-73-15-255.hipernet.inf.br