Robtex

Up: 186.211.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 186.211.16.0/21
Down right: 186.211.24.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
186.211.16.1	PTR	186-211-16-1.customer.nbtos.com.br
186.211.16.2	A+PTR	poseidon.nbtos.com.br
186.211.16.2	A	ns1.nbtos.com.br
186.211.16.2	A	dns1.nbtos.com.br
186.211.16.3	PTR	zeus.nbtos.com.br
186.211.16.3	A	ns2.nbtos.com.br
186.211.16.59	PTR	speedtest.netbarretos.com.br
186.211.16.59	A	nbtos.com.br
186.211.16.59	A	www.nbtos.com.br
186.211.16.67	PTR	67.16.211.186.nbtos.com.br
186.211.16.67	A	mailserver.minerva.ind.br
186.211.16.67	A	zimbra.minervafoods.com
186.211.16.94	PTR	186-211-16-94.customer.nbtos.com.br
186.211.16.170	PTR	186-211-16-170.customer.nbtos.com.br
186.211.16.170	A	countrynet.com.br
186.211.17.2	PTR	2.17.211.186.nbtos.com.br
186.211.18.218	PTR	218.18.211.186.nbtos.com.br
186.211.20.189	PTR	189.20.211.186.nbtos.com.br
186.211.20.189	A	mundodoanimal.com.br
186.211.22.29	PTR	29.22.211.186.nbtos.com.br
186.211.25.138	A	telprojhb.com
186.211.31.12	PTR	cache.google.com
186.211.31.12	A	r1---sn-oxuc5ggxuvncg-nw2ee.googlevideo.com
186.211.31.12	A	r1.sn-oxuc5ggxuvncg-nw2ee.googlevideo.com
186.211.31.13	PTR	cache.google.com
186.211.31.13	A	r2.sn-oxuc5ggxuvncg-nw2ee.googlevideo.com
186.211.31.81	PTR	81.31.211.186.nbtos.com.br
186.211.31.81	A	scontent.fbat1-1.fna.fbcdn.net
186.211.31.82	PTR	82.31.211.186.nbtos.com.br
186.211.31.82	A	video.fbat1-1.fna.fbcdn.net
186.211.31.88	PTR	88.31.211.186.nbtos.com.br
186.211.31.97	PTR	fbat1c01.netbarretos.fb.com
186.211.31.97	A	instagram.fbat1-1.fna.fbcdn.net
186.211.31.98	PTR	fbat1c01.netbarretos.fb.com
186.211.31.255	PTR	blackhole.spo.nbtos.com.br