Robtex

Up: 202.255.240.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 202.255.244.0/23
Down right: 202.255.246.0/23

IP	Type	Hostname
202.255.244.23	A+PTR	marine.cc.oita-ct.ac.jp
202.255.244.66	A+PTR	onct.oita-ct.ac.jp
202.255.244.67	A+PTR	onct-2.oita-ct.ac.jp
202.255.244.68	A+PTR	onct-4.oita-ct.ac.jp
202.255.244.75	A+PTR	mailgw.oita-ct.ac.jp
202.255.244.244	A+PTR	glob244.oita-ct.ac.jp
202.255.244.254	A+PTR	glob254.oita-ct.ac.jp