Robtex

Up: 123.240.192.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 123.240.192.0/20
Down right: 123.240.208.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.240.193.35	PTR	123-240-193-35.cctv.dynamic.tbcnet.net.tw
123.240.194.226	PTR	123-240-194-226.cctv.dynamic.tbcnet.net.tw
123.240.197.224	PTR	123-240-197-224.cctv.dynamic.tbcnet.net.tw
123.240.198.4	PTR	123-240-198-4.cctv.dynamic.tbcnet.net.tw
123.240.198.34	PTR	123-240-198-34.cctv.dynamic.tbcnet.net.tw
123.240.198.99	PTR	123-240-198-99.cctv.dynamic.tbcnet.net.tw
123.240.198.163	PTR	123-240-198-163.cctv.dynamic.tbcnet.net.tw
123.240.199.26	A	dns.successful.com.tw
123.240.199.26	A	synergy.7788.com.tw
123.240.199.26	A	tm888.com.tw
123.240.199.249	A	www.7788.com.tw
123.240.199.249	A	dns.tm888.com.tw
123.240.203.193	PTR	123-240-203-193.cctv.dynamic.tbcnet.net.tw
123.240.204.163	PTR	123-240-204-163.cctv.dynamic.tbcnet.net.tw
123.240.205.97	PTR	123-240-205-97.cctv.dynamic.tbcnet.net.tw
123.240.207.14	A	mail.seamus.idv.tw
123.240.207.14	A	seamus.idv.tw
123.240.207.35	PTR	123-240-207-35.cctv.dynamic.tbcnet.net.tw
123.240.207.98	PTR	123-240-207-98.cctv.dynamic.tbcnet.net.tw
123.240.207.247	A	infoex.infocloud.com
123.240.209.195	PTR	123-240-209-195.cctv.dynamic.tbcnet.net.tw
123.240.210.96	PTR	123-240-210-96.cctv.dy.tbcnet.net.tw
123.240.210.99	PTR	using.com.tw
123.240.211.38	A	infoex.infocloud.com
123.240.211.38	A	mail.infocloud.com
123.240.211.179	A	webtrans.com.tw
123.240.211.179	A	dentallink.com.tw
123.240.211.227	PTR	123-240-211-227.cctv.dynamic.tbcnet.net.tw
123.240.212.195	PTR	123-240-212-195.cctv.dynamic.tbcnet.net.tw
123.240.214.2	PTR	123-240-214-2.cctv.dynamic.tbcnet.net.tw
123.240.214.11	A	www.ihere.tw
123.240.214.11	A	ihere.tw
123.240.214.129	PTR	123-240-214-129.cctv.dynamic.tbcnet.net.tw
123.240.215.160	PTR	123-240-215-160.cctv.dynamic.tbcnet.net.tw
123.240.218.34	PTR	123-240-218-34.cctv.dynamic.tbcnet.net.tw