Robtex

Up: 191.240.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 191.240.0.0/18
Down right: 191.240.64.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
191.240.0.66	PTR	191-240-0-66.spo.axis1.com.br
191.240.0.66	A	intercabo.com.br
191.240.0.66	A	cqod.cn
191.240.0.68	PTR	191-240-0-68.spo.axis1.com.br
191.240.0.68	A	mail.axis1.com.br
191.240.0.69	A	ns1.mastercabo.com.br
191.240.0.77	A	intercabo.com.br
191.240.2.2	A+PTR	mta01msc.axis1.com.br
191.240.2.2	A	mail.unacabo.com.br
191.240.2.2	A	smtp.unacabo.com.br
191.240.2.3	PTR	wbm01msc.axis1.com.br
191.240.2.3	A	imap.mastercabo.com.br
191.240.2.3	A	webmail.mastercabo.com.br
191.240.2.20	A	mail.axis1.com.br
191.240.3.2	PTR	191-240-3-2.xe.core.bhe-dvl.axis1.com.br
191.240.3.2	A	vel-bhe.mastercabo.com.br
191.240.3.12	PTR	191-240-3-12.xe.core.bhe.axis1.com.br
191.240.3.12	A	ns2.mastercabo.com.br
191.240.3.13	A	kidplay.com.br
191.240.3.13	A	deckbeer.com.br
191.240.3.49	PTR	191-240-3-49.edge.bhe-dvl.axis1.com.br
191.240.3.171	PTR	191-240-3-171.vel-uni.mastercabo.com.br
191.240.3.171	A	vel-uni.mastercabo.com.br
191.240.3.209	PTR	191-240-3-209.bhe.axis1.com.br
191.240.3.210	PTR	191-240-3-210.bhe.axis1.com.br
191.240.3.210	A	video.fplu7-1.fna.fbcdn.net
191.240.3.222	A	z-1-scontent.fplu7-1.fna.fbcdn.net
191.240.3.225	A	media.fplu7-1.fna.whatsapp.net
191.240.5.33	PTR	191-240-5-33.bhe.axis1.com.br
191.240.5.33	A	instagram.fpoj2-1.fna.fbcdn.net
191.240.5.161	PTR	191-240-5-161.bhe.axis1.com.br
191.240.5.161	A	instagram.fppy5-1.fna.fbcdn.net
191.240.5.236	PTR	191-240-5-236.bhe.axis1.com.br
191.240.5.236	A	r1.sn-8p5hvj-hvjl.googlevideo.com
191.240.5.237	PTR	191-240-5-237.bhe.axis1.com.br
191.240.5.237	A	r2.sn-8p5hvj-hvjl.googlevideo.com
191.240.6.2	PTR	191-240-6-2.mastercabo.com.br
191.240.6.20	PTR	191-240-6-20.mastercabo.com.br
191.240.6.20	A	mail.unacabo.com.br
191.240.6.20	A	mail.mastercabo.com.br
191.240.6.21	PTR	191-240-6-21.mastercabo.com.br
191.240.6.21	A	imap.mastercabo.com.br
191.240.6.21	A	webmail.mastercabo.com.br
191.240.7.2	PTR	191-240-7-2.ssp.mastercabo.com.br
191.240.7.2	A	mta02msc.axis1.com.br
191.240.7.3	A	webmail.soumaster.com.br
191.240.10.42	PTR	191-240-10-42.cpj-wr.mastercabo.com.br
191.240.11.2	PTR	191-240-11-2.cpj-wr.mastercabo.com.br
191.240.14.2	PTR	191-240-14-2.cpj-wr.mastercabo.com.br
191.240.17.10	PTR	191-240-17-10.mastercabo.com.br
191.240.19.2	PTR	191-240-19-2.ssp.mastercabo.com.br
191.240.24.91	PTR	191-240-24-91.cuv-wr.mastercabo.com.br
191.240.24.139	PTR	191-240-24-139.cuv-wr.mastercabo.com.br
191.240.24.141	PTR	191-240-24-141.cuv-wr.mastercabo.com.br
191.240.25.214	PTR	191-240-25-214.cuv-wr.mastercabo.com.br
191.240.26.3	PTR	191-240-26-3.vga-fb.mastercabo.com.br
191.240.26.19	PTR	papelaria-net.vga-fb.mastercabo.com.br
191.240.26.19	A	meninajeitosa.com
191.240.26.19	A	mail.danielmineiro.com
191.240.27.217	PTR	191-240-26-217.vga-fb.mastercabo.com.br
191.240.27.217	A	papelaria.co
191.240.29.67	PTR	191-240-29-67.cpj-fb.mastercabo.com.br
191.240.29.245	PTR	191-240-29-245.cpj-fb.mastercabo.com.br
191.240.32.80	PTR	191-240-32-80.lna-wr.mastercabo.com
191.240.32.127	PTR	191-240-32-127.lna.mastercabo.com.br
191.240.36.149	PTR	191-240-36-149.mal-wr.mastercabo.com
191.240.42.24	PTR	191-240-42-24.sal.mastercabo.com.br
191.240.49.32	PTR	191-240-49-32.srs-wr.mastercabo.com.br
191.240.49.195	PTR	191-240-49-195.srs-wr.mastercabo.com.br
191.240.55.83	PTR	191-240-55-83.uni-fb.mastercabo.com.br
191.240.57.212	PTR	191-240-57-212.moc.mastercabo.com.br
191.240.59.226	PTR	191-240-59-226.mcl-wr.mastercabo.com.br
191.240.64.21	PTR	191-240-64-21.sla-wr.mastercabo.com.br
191.240.64.216	PTR	191-240-64-216.sla-wr.mastercabo.com.br
191.240.65.84	PTR	191-240-65-84.sla-wr.mastercabo.com.br
191.240.68.8	PTR	191-240-68-8.sla-wr.mastercabo.com.br
191.240.70.15	PTR	191-240-70-15.sla-wr.mastercabo.com.br
191.240.71.248	PTR	191-240-71-248.sla-wr.mastercabo.com.br
191.240.74.106	PTR	191-240-74-106.sla-wr.mastercabo.com.br
191.240.79.71	PTR	191-240-79-71.sla.mastercabo.com.br
191.240.85.230	PTR	191-240-85-230.sla-wr.mastercabo.com.br
191.240.87.69	PTR	191-240-87-69.sla-wr.mastercabo.com.br
191.240.95.34	A	siderpa.com.br
191.240.96.22	PTR	191-240-96-22.prs-wr.mastercabo.com.br
191.240.99.142	PTR	191-240-99-142.prs-wr.mastercabo.com.br
191.240.100.127	PTR	191-240-100-127.mcl-fb.mastercabo.com.br
191.240.101.71	PTR	191-240-101-71.mastercabo.com.br
191.240.101.215	PTR	191-240-101-215.mastercabo.com.br
191.240.112.10	PTR	191-240-112-10.lav-wifi.mastercabo.com.br
191.240.113.85	PTR	191-240-113-85.lav-wr.mastercabo.com.br
191.240.113.92	PTR	191-240-113-92.lav-wr.mastercabo.com.br
191.240.114.201	PTR	191-240-114-201.lav-wr.mastercabo.com.br
191.240.123.215	PTR	191-240-123-215.uni-fb.mastercabo.com.br
191.240.127.255	PTR	191-240-127-255.uni-fb.mastercabo.com.br