Robtex

Up: 220.228.96.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 220.228.104.0/22
Down right: 220.228.108.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
220.228.107.41	PTR	adsl-220-228-107-41.tc.sparqnet.net
220.228.107.41	A	mail.iware.mx
220.228.107.41	A	dns1.varexx.com
220.228.108.5	PTR	adsl-220-228-108-5.bc.sparqnet.net
220.228.108.146	PTR	adsl-220-228-108-146.bc.sparqnet.net
220.228.108.149	PTR	adsl-220-228-108-149.bc.sparqnet.net
220.228.108.149	A	dns1.top-insight.com
220.228.108.150	PTR	adsl-220-228-108-150.bc.sparqnet.net
220.228.108.150	A	mail-2.top-insight.com
220.228.109.116	PTR	adsl-220-228-109-116.bc.sparqnet.net
220.228.109.162	PTR	adsl-220-228-109-162.bc.sparqnet.net
220.228.109.162	A	name.hcmf.com.tw