Robtex

Up: 123.240.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 123.240.16.0/21
Down right: 123.240.24.0/21

IP	Type	Hostname
123.240.16.1	PTR	123-240-16-1.cctv.dynamic.tbcnet.net.tw
123.240.16.16	PTR	123-240-16-16.cctv.dynamic.tbcnet.net.tw
123.240.16.242	PTR	123-240-16-242.cctv.dynamic.tbcnet.net.tw
123.240.17.147	PTR	123-240-17-147.cctv.dynamic.tbcnet.net.tw
123.240.17.176	PTR	123-240-17-176.cctv.dynamic.tbcnet.net.tw
123.240.18.23	A	fuhbao.com.tw
123.240.18.23	A	www.fuhbao.com.tw
123.240.18.193	PTR	123-240-18-193.cctv.dy.tbcnet.net.tw
123.240.18.195	PTR	123-240-18-195.cctv.dy.tbcnet.net.tw
123.240.19.162	PTR	123-240-19-162.cctv.dynamic.tbcnet.net.tw
123.240.19.178	PTR	123-240-19-178.cctv.dynamic.tbcnet.net.tw
123.240.19.195	PTR	123-240-19-195.cctv.dynamic.tbcnet.net.tw
123.240.19.240	PTR	123-240-19-240.cctv.dynamic.tbcnet.net.tw
123.240.20.2	PTR	123-240-20-2.cctv.dynamic.tbcnet.net.tw
123.240.20.123	A	kchengofly.com
123.240.21.2	PTR	123-240-21-2.cctv.dynamic.tbcnet.net.tw
123.240.21.4	PTR	123-240-21-4.cctv.dynamic.tbcnet.net.tw
123.240.21.16	PTR	123-240-21-16.cctv.dynamic.tbcnet.net.tw
123.240.23.48	PTR	123-240-23-48.cctv.dynamic.tbcnet.net.tw
123.240.24.33	PTR	123-240-24-33.cctv.dynamic.tbcnet.net.tw
123.240.24.225	PTR	123-240-24-225.cctv.dynamic.tbcnet.net.tw
123.240.25.67	PTR	123-240-25-67.cctv.dynamic.tbcnet.net.tw
123.240.25.242	PTR	123-240-25-242.cctv.dynamic.tbcnet.net.tw
123.240.26.33	PTR	123-240-26-33.cctv.dynamic.tbcnet.net.tw
123.240.27.1	PTR	123-240-27-1.cctv.dynamic.tbcnet.net.tw
123.240.27.16	A	mail.taxi1420.com
123.240.27.16	A	taxi1420.com
123.240.27.82	PTR	123-240-27-82.cctv.dynamic.tbcnet.net.tw
123.240.27.114	PTR	123-240-27-114.cctv.dynamic.tbcnet.net.tw
123.240.29.194	PTR	123-240-29-194.cctv.dy.tbcnet.net.tw
123.240.29.244	A	www.kende.com.tw
123.240.30.3	PTR	123-240-30-3.cctv.dynamic.tbcnet.net.tw
123.240.30.64	PTR	123-240-30-64.cctv.dynamic.tbcnet.net.tw
123.240.30.80	PTR	123-240-30-80.cctv.dynamic.tbcnet.net.tw
123.240.30.115	PTR	123-240-30-115.cctv.dynamic.tbcnet.net.tw
123.240.30.161	PTR	123-240-30-161.cctv.dynamic.tbcnet.net.tw