Robtex

Up: 203.67.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.67.20.0/23
Down right: 203.67.22.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.67.20.2	A+PTR	203-67-20-2.adsl.dynamic.seed.net.tw
203.67.20.42	A+PTR	203-67-20-42.adsl.dynamic.seed.net.tw
203.67.21.20	PTR	h20-203-67-21.seed.net.tw
203.67.21.21	PTR	h21-203-67-21.seed.net.tw
203.67.21.51	A	msa.nando.com.tw
203.67.21.52	A	ms1.nando.com.tw
203.67.21.80	PTR	h80-203-67-21.seed.net.tw
203.67.21.154	A+PTR	aw5100.san-tung.com.tw
203.67.21.154	A	dns.san-tung.com.tw
203.67.21.154	A	mail.san-tung.com.tw
203.67.21.157	PTR	mail2.san-tung.com.tw
203.67.21.217	PTR	mail.allproducts.com.tw
203.67.23.149	PTR	mail.lotshome.com.tw
203.67.23.165	PTR	declare.avermedia.com
203.67.23.170	PTR	twspa01.avermedia.com
203.67.23.171	PTR	twspa03.avermedia.com
203.67.23.172	A+PTR	ns2.avermedia.com
203.67.23.172	A	ns3.avermedia.com
203.67.23.172	A	ns5.avermedia.com.tr
203.67.23.177	PTR	mail.avermedia.com
203.67.23.188	A+PTR	dynip.avermedia.com
203.67.23.189	PTR	lpip.avermedia.com
203.67.23.189	A	lp.avermedia.com.cn
203.67.23.189	A	lp.avermedia.com.tw