Robtex

Up: 220.228.112.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 220.228.120.0/22
Down right: 220.228.124.0/22

IP	Type	Hostname
220.228.120.48	PTR	protech.com.tw
220.228.120.49	PTR	protech.com.tw
220.228.120.50	PTR	protech.com.tw
220.228.120.51	PTR	protech.com.tw
220.228.120.56	PTR	protech.com.tw
220.228.120.57	PTR	protech.com.tw
220.228.120.58	PTR	protech.com.tw
220.228.120.59	PTR	protech.com.tw
220.228.120.91	PTR	adsl-220-228-120-91.nh.sparqnet.net
220.228.120.184	PTR	adsl-220-228-120-184.nh.sparqnet.net
220.228.126.3	PTR	adsl-220-228-126-3.nh.sparqnet.net
220.228.127.146	PTR	adsl-220-228-127-146.nh.sparqnet.net