Robtex

Up: 61.5.240.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 61.5.240.0/23
Down right: 61.5.242.0/23

IP	Type	Hostname
61.5.240.206	PTR	206.240.5.61.ap.yournet.ne.jp
61.5.243.22	A+PTR	22.243.5.61.ap.yournet.ne.jp
61.5.243.36	A+PTR	36.243.5.61.ap.yournet.ne.jp
61.5.243.88	A+PTR	88.243.5.61.ap.yournet.ne.jp
61.5.243.89	A+PTR	89.243.5.61.ap.yournet.ne.jp
61.5.243.108	A+PTR	108.243.5.61.ap.yournet.ne.jp
61.5.243.116	A+PTR	116.243.5.61.ap.yournet.ne.jp
61.5.243.226	A+PTR	226.243.5.61.ap.yournet.ne.jp