Robtex

Up: 189.124.80.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 189.124.80.0/23
Down right: 189.124.82.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
189.124.80.2	PTR	2.80.124.189.assim.net
189.124.80.5	PTR	5.80.124.189.assim.net
189.124.80.18	A	webserver.acertelecom.com.br
189.124.80.18	A	pontalnet.com.br
189.124.80.18	A	commtat.com.br
189.124.80.19	A	mailserver.acertelecom.com.br
189.124.80.76	PTR	76.80.124.189.assim.net
189.124.80.76	PTR	cache.google.com
189.124.80.76	A	r1.sn-5nnphcg-22ce.googlevideo.com
189.124.80.78	PTR	78.80.124.189.assim.net
189.124.80.78	PTR	cache.google.com
189.124.80.145	PTR	145.80.124.189.assim.net
189.124.80.145	A	scontent.fppb1-1.fna.fbcdn.net
189.124.80.146	PTR	146.80.124.189.assim.net
189.124.80.146	A	video.fppb1-1.fna.fbcdn.net
189.124.80.158	PTR	158.80.124.189.assim.net
189.124.80.158	A	sonar.fppb1-1.fna.fbcdn.net
189.124.80.160	PTR	160.80.124.189.assim.net
189.124.80.160	A	z-p3-scontent.fppb1-1.fna.fbcdn.net
189.124.80.161	PTR	161.80.124.189.assim.net
189.124.80.161	A	instagram.fppb1-1.fna.fbcdn.net
189.124.80.162	PTR	162.80.124.189.assim.net
189.124.80.162	A	media.fppb1-1.fna.whatsapp.net
189.124.82.10	PTR	10.82.124.189.assim.net
189.124.82.218	PTR	218.82.124.189.assim.net
189.124.83.16	PTR	16.83.124.189.assim.net