Robtex

Up: 220.159.208.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 220.159.208.0/22
Down right: 220.159.212.0/22

IP	Type	Hostname
220.159.212.65	A+PTR	mailx.mopera.net
220.159.212.66	A+PTR	mailx.mopera.net
220.159.212.69	A+PTR	mailx.mopera.net
220.159.212.70	A+PTR	mailx.mopera.net
220.159.212.94	A+PTR	mailx.mopera.net
220.159.212.95	A+PTR	mailx.mopera.net
220.159.212.114	A+PTR	mail.mopera.ne.jp
220.159.212.119	A	mail.mopera.net
220.159.212.200	PTR	ns1.mopera.net
220.159.212.201	PTR	ns2.mopera.net