Robtex

Up: 139.0.96.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 139.0.104.0/22
Down right: 139.0.108.0/22

IP	Type	Hostname
139.0.104.8	PTR	fm-dyn-139-0-104-8.fast.net.id
139.0.104.19	PTR	fm-dyn-139-0-104-19.fast.net.id
139.0.104.49	PTR	fm-dyn-139-0-104-49.fast.net.id
139.0.104.171	PTR	fm-dyn-139-0-104-171.fast.net.id
139.0.104.176	PTR	fm-dyn-139-0-104-176.fast.net.id
139.0.104.184	PTR	fm-dyn-139-0-104-184.fast.net.id
139.0.104.200	PTR	fm-dyn-139-0-104-200.fast.net.id
139.0.105.42	PTR	fm-dyn-139-0-105-42.fast.net.id
139.0.106.113	PTR	fm-dyn-139-0-106-113.fast.net.id
139.0.106.145	PTR	fm-dyn-139-0-106-145.fast.net.id
139.0.107.9	PTR	fm-dyn-139-0-107-9.fast.net.id