Robtex

Up: 186.216.176.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 186.216.184.0/22
Down right: 186.216.188.0/22

IP	Type	Hostname
186.216.184.24	PTR	186.216.184.24.user.vctelecom.com.br
186.216.184.231	PTR	186.216.184.231.user.vctelecom.com.br
186.216.185.183	PTR	186.216.185.183.user.vctelecom.com.br
186.216.186.193	PTR	186.216.186.193.user.vctelecom.com.br
186.216.190.140	PTR	186.216.190.140.user.vctelecom.com.br
186.216.190.140	A	r1.sn-8vjx-hj2l.googlevideo.com
186.216.190.141	PTR	186.216.190.141.user.vctelecom.com.br
186.216.190.141	A	r2.sn-8vjx-hj2l.googlevideo.com
186.216.190.209	PTR	186.216.190.209.user.vctelecom.com.br
186.216.190.209	A	external.fmcp1-1.fna.fbcdn.net
186.216.190.210	PTR	186.216.190.210.user.vctelecom.com.br
186.216.190.210	A	video.fmcp1-1.fna.fbcdn.net
186.216.190.224	PTR	186.216.190.224.user.vctelecom.com.br
186.216.190.224	A	z-p3-scontent.fmcp1-1.fna.fbcdn.net
186.216.190.225	PTR	186.216.190.225.user.vctelecom.com.br
186.216.190.225	A	instagram.fmcp1-1.fna.fbcdn.net
186.216.190.226	PTR	186.216.190.226.user.vctelecom.com.br
186.216.190.226	A	media.fmcp1-1.fna.whatsapp.net
186.216.191.2	PTR	186.216.191.2.user.vctelecom.com.br
186.216.191.3	PTR	186.216.191.3.user.vctelecom.com.br
186.216.191.5	PTR	186.216.191.5.user.vctelecom.com.br
186.216.191.35	PTR	186.216.191.35.user.vctelecom.com.br
186.216.191.64	PTR	186.216.191.64.user.vctelecom.com.br
186.216.191.69	PTR	186.216.191.69.user.vctelecom.com.br
186.216.191.204	PTR	cache.google.com
186.216.191.204	A	r1---sn-8vjx-hj2e.googlevideo.com
186.216.191.204	A	r1.sn-8vjx-hj2e.googlevideo.com
186.216.191.205	PTR	cache.google.com
186.216.191.205	A	r2.sn-8vjx-hj2e.googlevideo.com
186.216.191.206	PTR	cache.google.com
186.216.191.206	A	r3---sn-8vjx-hj2e.googlevideo.com