Robtex

Up: 203.73.48.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 203.73.56.0/22
Down right: 203.73.60.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.73.56.17	A+PTR	203-73-56-17.adsl.dynamic.seed.net.tw
203.73.56.66	A	203-73-56-66.adsl.dynamic.seed.net.tw
203.73.58.6	A	www.citystar.com.tw
203.73.58.6	A	citystar.com.tw
203.73.58.17	PTR	dns3.moteck.com.tw
203.73.58.17	PTR	mail.moteck.com.tw
203.73.58.19	PTR	mail.moteck.com.tw
203.73.58.19	PTR	dns3.moteck.com.tw
203.73.58.95	A+PTR	mail.weilink.com
203.73.58.97	A	www.weilink.com
203.73.58.180	A	www.unitesys.com.tw
203.73.58.180	A	www.mamihome.tw
203.73.58.188	A+PTR	mail.welltern.com
203.73.59.125	PTR	kinetic.com.tw
203.73.59.126	PTR	kinetic.com.tw
203.73.59.127	PTR	kinetic.com.tw
203.73.59.194	A	chinhua.com.tw
203.73.59.194	A	www.chinhua.com.tw
203.73.59.245	A	www.utc.tw
203.73.59.245	A	utc.tw
203.73.60.144	PTR	h144-203-73-60.suna.com.tw
203.73.60.156	A	mail.polarstar.com.tw
203.73.61.35	A+PTR	203-73-61-35.adsl.dynamic.seed.net.tw
203.73.61.46	A	203-73-61-46.adsl.dynamic.seed.net.tw
203.73.61.201	A+PTR	203-73-61-201.adsl.dynamic.seed.net.tw
203.73.62.140	A	www.mytech.tw
203.73.62.161	A	www.hohyeeu.com.tw
203.73.62.161	A	www.yu-te.com
203.73.62.161	A	www.yunpu.com.tw
203.73.62.167	A	shineyear.com.tw
203.73.63.40	PTR	h40-203-73-63.seed.net.tw
203.73.63.40	A	dns.ms-group.com.tw
203.73.63.120	A	www.xn--sosp6de6iyu1c.tw
203.73.63.120	A	dns.village-cloud.tw
203.73.63.120	A	dns.xn--sosp6de6iyu1c.tw
203.73.63.166	A	wisdom-fx.com
203.73.63.166	A	mail.allrichfund.com
203.73.63.166	A	mail.bositang-trustee.com