Robtex

Up: 123.0.224.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 123.0.232.0/22
Down right: 123.0.236.0/22

IP	Type	Hostname
123.0.232.178	PTR	123-0-232-178.nty.dy.tbcnet.net.tw
123.0.235.11	PTR	123-0-235-11.nty.dy.tbcnet.net.tw
123.0.235.146	PTR	123-0-235-146.nty.dy.tbcnet.net.tw
123.0.238.19	PTR	123-0-238-19.nty.dy.tbcnet.net.tw
123.0.238.32	PTR	123-0-238-32.nty.dy.tbcnet.net.tw
123.0.238.33	A	xdesigter.com
123.0.238.144	PTR	123-0-238-144.nty.dy.tbcnet.net.tw
123.0.239.75	PTR	123-0-239-75.nty.dy.tbcnet.net.tw