Robtex

Up: 220.228.224.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 220.228.240.0/21
Down right: 220.228.248.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
220.228.241.190	PTR	nat190.doubleservice.com
220.228.241.190	A	ns1.doubleservice.com.tw
220.228.241.233	PTR	adsl-220-228-241-233.nh.sparqnet.net
220.228.242.7	A+PTR	mail.e-usi.com
220.228.242.7	A	championvc.com.tw
220.228.242.7	A	www.e-usi.com
220.228.242.228	A	pglc.tw
220.228.242.228	A	www.pglc.tw
220.228.243.99	A	server1.donlon.com.tw
220.228.243.244	A+PTR	purin.2y.cc
220.228.243.244	A	dns.2y.cc
220.228.243.244	A	purin.2y.idv.tw
220.228.244.76	A	ms.ealpha.com.tw
220.228.244.76	A	h3.ealpha.com.tw
220.228.244.76	A	msdsc.ealpha.com.tw
220.228.244.169	A	mail.webavd.com
220.228.244.251	PTR	elit.com.tw
220.228.247.125	A	william-web.com.tw
220.228.254.51	PTR	mail.atl-lab.com.tw
220.228.254.142	PTR	adsl-220-228-254-142.bc.sparqnet.net
220.228.254.142	A	dns3.orisetech.com
220.228.254.143	PTR	adsl-220-228-254-143.bc.sparqnet.net
220.228.254.163	PTR	adsl-220-228-254-163.bc.sparqnet.net
220.228.254.163	A	mumou.com.tw
220.228.254.226	PTR	adsl-220-228-254-226.bc.sparqnet.net
220.228.254.226	A	dns2.sitronix.com.tw