Robtex

Up: 186.250.40.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 186.250.40.0/23
Down right: 186.250.42.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
186.250.40.3	A	dns2.redeminastelecom.com.br
186.250.40.12	PTR	br01.srvbr01.com.br
186.250.40.12	A	redeminastelecom.com.br
186.250.40.12	A	redeminas.net
186.250.40.22	PTR	186-250-40-22.dyn.redeminastelecom.com.br
186.250.40.68	A	speedria1.redeminastelecom.com.br
186.250.40.68	A	velocidade.redeminas.net
186.250.40.68	A	speedcon1.redeminastelecom.com.br
186.250.42.35	PTR	186-250-42-35.dyn.redeminastelecom.com.br
186.250.43.121	PTR	186-250-43-121.dyn.redeminastelecom.com.br
186.250.43.151	PTR	186-250-43-151.dyn.redeminastelecom.com.br