Robtex

Up: 139.194.56.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 139.194.60.0/23
Down right: 139.194.62.0/23

IP	Type	Hostname
139.194.60.241	PTR	fm-dyn-139-194-60-241.fast.net.id
139.194.61.87	PTR	fm-dyn-139-194-61-87.fast.net.id
139.194.61.229	PTR	fm-dyn-139-194-61-229.fast.net.id
139.194.62.238	PTR	fm-dyn-139-194-62-238.fast.net.id
139.194.63.120	PTR	fm-dyn-139-194-63-120.fast.net.id