Robtex

Up: 186.250.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 186.250.52.0/23
Down right: 186.250.54.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
186.250.52.23	A+PTR	186.250.52.23.redfoxtelecom.com.br
186.250.52.33	A+PTR	186.250.52.33.redfoxtelecom.com.br
186.250.52.88	A+PTR	186.250.52.88.redfoxtelecom.com.br
186.250.52.94	A+PTR	186.250.52.94.redfoxtelecom.com.br
186.250.52.96	A+PTR	186.250.52.96.redfoxtelecom.com.br
186.250.52.119	A+PTR	186.250.52.119.redfoxtelecom.com.br
186.250.52.202	A+PTR	186.250.52.202.redfoxtelecom.com.br
186.250.52.206	A+PTR	186.250.52.206.redfoxtelecom.com.br
186.250.52.237	A+PTR	186.250.52.237.redfoxtelecom.com.br
186.250.52.255	A+PTR	186.250.52.255.redfoxtelecom.com.br
186.250.53.12	A+PTR	186.250.53.12.redfoxtelecom.com.br
186.250.53.31	A+PTR	186.250.53.31.redfoxtelecom.com.br
186.250.53.103	A+PTR	186.250.53.103.redfoxtelecom.com.br
186.250.53.112	PTR	186-250-53-112.customer.redfoxtelecom.com.br
186.250.53.122	A+PTR	186.250.53.122.redfoxtelecom.com.br
186.250.53.189	A+PTR	186.250.53.189.redfoxtelecom.com.br
186.250.53.215	A+PTR	186.250.53.215.redfoxtelecom.com.br
186.250.53.219	A+PTR	186.250.53.219.redfoxtelecom.com.br
186.250.54.60	A+PTR	186.250.54.60.redfoxtelecom.com.br
186.250.54.99	A+PTR	186.250.54.99.redfoxtelecom.com.br
186.250.54.116	A+PTR	186.250.54.116.redfoxtelecom.com.br
186.250.54.188	A+PTR	186.250.54.188.redfoxtelecom.com.br
186.250.54.223	A+PTR	186.250.54.223.redfoxtelecom.com.br
186.250.55.21	A+PTR	186.250.55.21.redfoxtelecom.com.br
186.250.55.85	A+PTR	186.250.55.85.redfoxtelecom.com.br
186.250.55.93	A+PTR	186.250.55.93.redfoxtelecom.com.br
186.250.55.124	A+PTR	186.250.55.124.redfoxtelecom.com.br
186.250.55.134	A+PTR	186.250.55.134.redfoxtelecom.com.br
186.250.55.137	A+PTR	186.250.55.137.redfoxtelecom.com.br
186.250.55.218	PTR	186.250.55.218.redfoxtelecom.com.br
186.250.55.218	A	occ-1-1417-1123.1.nflxso.net
186.250.55.218	A	occ-1-1417-1567.1.nflxso.net