Robtex

Up: 220.228.104.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 220.228.108.0/23
Down right: 220.228.110.0/23

IP	Type	Hostname
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