Robtex

Up: 123.204.216.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 123.204.220.0/23
Down right: 123.204.222.0/23

IP	Type	Hostname
123.204.221.4	A+PTR	123-204-221-4.static.seed.net.tw
123.204.221.8	A+PTR	123-204-221-8.static.seed.net.tw
123.204.221.12	A+PTR	123-204-221-12.static.seed.net.tw
123.204.221.42	A+PTR	123-204-221-42.static.seed.net.tw
123.204.221.54	A+PTR	123-204-221-54.static.seed.net.tw
123.204.221.63	A+PTR	123-204-221-63.static.seed.net.tw
123.204.221.81	A+PTR	123-204-221-81.static.seed.net.tw
123.204.221.89	A+PTR	123-204-221-89.static.seed.net.tw
123.204.221.91	A+PTR	123-204-221-91.static.seed.net.tw
123.204.221.92	A+PTR	123-204-221-92.static.seed.net.tw
123.204.221.162	PTR	123-204-221-162.static.seed.net.tw
123.204.222.9	PTR	123-204-222-9.static.seed.net.tw
123.204.223.178	A+PTR	123-204-223-178.static.seed.net.tw
123.204.223.194	A+PTR	123-204-223-194.static.seed.net.tw
123.204.223.255	PTR	123-204-223-255.static.seed.net.tw