Robtex

Up: 138.204.136.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 138.204.140.0/23
Down right: 138.204.142.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
138.204.140.109	A+PTR	138-204-140-109.inforbarra.com.br
138.204.140.140	A+PTR	public-dns.inforbarra.com.br
138.204.140.140	A	inforbarra.com.br
138.204.140.141	A+PTR	public-dns2.inforbarra.com.br
138.204.141.38	A	occ-1-2174-1567.1.nflxso.net
138.204.141.54	A	occ-1-2174-1567.1.nflxso.net
138.204.141.54	A	occ-0-2174-1380.1.nflxso.net
138.204.141.62	PTR	138-204-141-62.inforbarra.com.br
138.204.141.62	A	occ-1-2174-1567.1.nflxso.net
138.204.141.62	A	occ-0-2174-1380.1.nflxso.net
138.204.141.81	PTR	138-204-141-81.inforbarra.com.br
138.204.141.81	A	scontent.fvdc1-1.fna.fbcdn.net
138.204.141.82	PTR	138-204-141-82.inforbarra.com.br
138.204.141.82	A	video.fvdc1-1.fna.fbcdn.net
138.204.141.94	PTR	138-204-141-94.inforbarra.com.br
138.204.141.94	A	sonar.fvdc1-1.fna.fbcdn.net
138.204.141.96	PTR	138-204-141-96.inforbarra.com.br
138.204.141.96	A	z-p3-scontent.fvdc1-1.fna.fbcdn.net
138.204.141.97	PTR	138-204-141-97.inforbarra.com.br
138.204.141.97	A	instagram.fvdc1-1.fna.fbcdn.net
138.204.141.98	PTR	138-204-141-98.inforbarra.com.br
138.204.141.98	A	media.fvdc1-1.fna.whatsapp.net
138.204.141.250	PTR	138-204-141-250.inforbarra.com.br
138.204.142.161	PTR	138-204-142-161.inforbarra.com.br
138.204.142.161	A	www.dataplanet.com.br
138.204.142.198	PTR	138-204-142-198.inforbarra.com.br
138.204.142.210	A	flatcristina.com.br
138.204.143.12	PTR	cache.google.com
138.204.143.12	A	r1.sn-po4vgc5gg5-8qje.googlevideo.com
138.204.143.12	A	r1.sn-po4vgc5gg5-8qje.c.youtube.com
138.204.143.13	PTR	cache.google.com
138.204.143.14	PTR	cache.google.com
138.204.143.82	PTR	138-204-143-82.inforbarra.com.br