Robtex

Up: 203.73.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 203.73.16.0/22
Down right: 203.73.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.73.16.2	PTR	203-73-16-2.adsl.dynamic.seed.net.tw
203.73.16.223	A	203-73-16-223.adsl.dynamic.seed.net.tw
203.73.17.56	A+PTR	203-73-17-56.adsl.dynamic.seed.net.tw
203.73.18.74	PTR	203-73-18-74.adsl.static.seed.net.tw
203.73.18.88	A	203-73-18-88.adsl.dynamic.seed.net.tw
203.73.18.194	PTR	203-73-18-194.adsl.static.seed.net.tw
203.73.19.29	A	gausscom.com.tw
203.73.19.30	A	sanchungrotary.org.tw
203.73.19.74	PTR	h74-203-73-19.seed.net.tw
203.73.19.176	PTR	h176-203-73-19.seed.net.tw
203.73.19.176	A	dns2.chengfwa.com.tw
203.73.19.218	PTR	gneic.com
203.73.19.218	A	dns.globalnet-elec.com
203.73.19.219	PTR	gneic.com
203.73.20.24	A	203-73-20-24.adsl.dynamic.seed.net.tw
203.73.20.26	A+PTR	203-73-20-26.adsl.dynamic.seed.net.tw
203.73.20.57	PTR	203-73-20-57.adsl.dynamic.seed.net.tw
203.73.20.94	A	203-73-20-94.adsl.dynamic.seed.net.tw
203.73.20.99	A	mail.vanengenchiropractic.com
203.73.21.52	A	edm01.iwant-in.net
203.73.21.54	A	obtampon.com.tw
203.73.21.54	A	dora-world.iwant-in.net
203.73.21.54	A	www.obtampon.com.tw
203.73.21.60	A	www.iwant-in.net
203.73.21.74	A	himedia3.iwant-in.net
203.73.21.75	A	himedia3.iwant-in.net
203.73.21.196	A	casurvey.com.tw
203.73.21.244	A	www1.iwant-radio.com
203.73.21.247	A	itry.com.tw
203.73.22.132	PTR	ns1.xthink.com.tw
203.73.22.132	A	ns1.917play.com.tw
203.73.22.132	A	xthink.com.tw
203.73.22.146	A	pay.61.com.tw
203.73.22.153	A+PTR	ns2.xthink.com.tw
203.73.22.153	A	ns2.61.com.tw
203.73.22.153	A	ns2.917play.com.tw
203.73.22.196	A	www.61.com.tw
203.73.22.201	A	reg.51mole.com.tw