Robtex

Up: 123.240.198.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 123.240.199.0/25
Down right: 123.240.199.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.240.199.26	PTR	123-240-199-26.cctv.dy.tbcnet.net.tw
123.240.199.26	A	dns.successful.com.tw
123.240.199.26	A	synergy.7788.com.tw
123.240.199.249	A	www.7788.com.tw
123.240.199.249	A	dns.tm888.com.tw