Robtex

Up: 177.66.96.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 177.66.100.0/23
Down right: 177.66.102.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
177.66.100.0	PTR	177-66-100-0.dynamic.wntelecom.net.br
177.66.100.33	PTR	177-66-100-33.dynamic.wntelecom.net.br
177.66.100.33	A	instagram.fudi4-1.fna.fbcdn.net
177.66.103.7	A+PTR	speedtest2.wntelecom.net.br
177.66.103.8	PTR	177-66-103-8.dynamic.wntelecom.net.br
177.66.103.8	A	speedtest2.wntelecom.net.br
177.66.103.14	PTR	ns2.anydns.com.br
177.66.103.14	PTR	ns1.anydns.com.br
177.66.103.14	A	ns2.terah.co.uk
177.66.103.142	A+PTR	ip-177-66-103-142.bandalarga.wntelecom.net.br
177.66.103.142	A	www.labsantaclara.net.br
177.66.103.142	A	labsantaclara.net.br
177.66.103.200	A+PTR	ip-177-66-103-200.bandalarga.wntelecom.net.br
177.66.103.255	PTR	177-66-103-255.dynamic.wntelecom.net.br