Robtex

Up: 118.136.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 118.136.48.0/23
Down right: 118.136.50.0/23

IP	Type	Hostname
118.136.48.0	PTR	fm-dyn-118-136-48-0.fast.net.id
118.136.48.40	PTR	fm-dyn-118-136-48-40.fast.net.id
118.136.48.70	A	fm-ip-118.136.48.70.fast.net.id
118.136.49.24	PTR	fm-dyn-118-136-49-24.fast.net.id
118.136.49.44	PTR	fm-dyn-118-136-49-44.fast.net.id
118.136.49.190	PTR	fm-dyn-118-136-49-190.fast.net.id
118.136.49.194	PTR	fm-dyn-118-136-49-194.fast.net.id
118.136.50.0	PTR	fm-dyn-118-136-50-0.fast.net.id
118.136.50.143	PTR	fm-dyn-118-136-50-143.fast.net.id
118.136.50.170	PTR	fm-dyn-118-136-50-170.fast.net.id
118.136.50.255	PTR	fm-dyn-118-136-50-255.fast.net.id
118.136.51.0	PTR	fm-dyn-118-136-51-0.fast.net.id
118.136.51.170	PTR	fm-dyn-118-136-51-170.fast.net.id
118.136.51.247	A	fm-ip-118.136.51.247.fast.net.id
118.136.51.255	PTR	fm-dyn-118-136-51-255.fast.net.id