Robtex

Up: 191.253.192.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 191.253.208.0/21
Down right: 191.253.216.0/21

IP	Type	Hostname
191.253.208.1	PTR	cache.google.com
191.253.208.2	PTR	cache.google.com
191.253.208.12	PTR	cache.google.com
191.253.208.12	A	r1---sn-cg5npaoxu-bpbe.googlevideo.com
191.253.208.13	PTR	cache.google.com
191.253.208.13	A	r2.sn-cg5npaoxu-bpbe.googlevideo.com
191.253.208.14	A	r3---sn-cg5npaoxu-bpbe.googlevideo.com
191.253.208.14	A	r3.sn-cg5npaoxu-bpbe.gvt1.com
191.253.208.82	PTR	191-253-208-82.cliente.brasilnet.net.br
191.253.208.82	A	ipv4-c001-jdf001-brasilnet-isp.1.oca.nflxvideo.net
191.253.208.132	PTR	191-253-208-132.cliente.brasilnet.net.br
191.253.211.59	PTR	211-253-191-59.cliente.brasilnet.net.br
191.253.213.116	PTR	213-253-191-116.cliente.brasilnet.net.br
191.253.213.145	PTR	213-253-191-145.cliente.brasilnet.net.br
191.253.213.145	A	scontent.fmea2-1.fna.fbcdn.net
191.253.213.146	PTR	213-253-191-146.cliente.brasilnet.net.br
191.253.213.146	A	video.fmea2-1.fna.fbcdn.net
191.253.213.160	PTR	213-253-191-160.cliente.brasilnet.net.br
191.253.213.160	A	z-p3-scontent.fmea2-1.fna.fbcdn.net
191.253.213.161	PTR	213-253-191-161.cliente.brasilnet.net.br
191.253.213.161	A	instagram.fmea2-1.fna.fbcdn.net
191.253.213.162	PTR	213-253-191-162.cliente.brasilnet.net.br
191.253.213.162	A	media.fmea2-1.fna.whatsapp.net
191.253.214.6	A	mail.tecnotec.net.br
191.253.214.6	A	mail.3wlink.com.br
191.253.214.38	PTR	191-253-214-38.brasilnet.net.br
191.253.214.38	A	speedtest01.brasilnet.net.br
191.253.214.118	PTR	interno.brasilnet.net.br
191.253.214.230	PTR	191-253-214-230.brasilnet.net.br
191.253.214.236	PTR	191-253-214-236.brasilnet.net.br
191.253.217.22	PTR	217-253-191-22.cliente.brasilnet.net.br
191.253.217.133	PTR	217-253-191-133.cliente.brasilnet.net.br
191.253.219.156	PTR	219-253-191-156.cliente.brasilnet.net.br
191.253.221.100	PTR	221-253-191-100.cliente.brasilnet.net.br