Robtex

Up: 168.228.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 168.228.68.0/23
Down right: 168.228.70.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
168.228.68.74	A+PTR	168-228-68-74.outcenter.com.br
168.228.68.74	A	occ-1-1421-1123.1.nflxso.net
168.228.68.74	A	occ-0-1421-1123.1.nflxso.net
168.228.71.60	PTR	168-228-71-60.outcenter.com.br
168.228.71.60	A	muroot.com