Robtex

Up: 203.203.80.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 203.203.80.0/22
Down right: 203.203.84.0/22

IP	Type	Hostname
203.203.80.166	A	host-203-203-80-166.dynamic.kbtelecom.net
203.203.83.216	PTR	host-203-203-83-216.dynamic.kbtelecom.net
203.203.83.227	A	203-203-83-227.cable.dynamic.giga.net.tw
203.203.84.175	A	host-203-203-84-175.dynamic.kbtelecom.net
203.203.84.176	PTR	host-203-203-84-176.dynamic.kbtelecom.net
203.203.84.225	PTR	host-203-203-84-225.dynamic.kbtelecom.net
203.203.84.236	A	host-203-203-84-236.dynamic.kbtelecom.net
203.203.85.3	PTR	host-203-203-85-3.dynamic.kbtelecom.net
203.203.85.9	A	host-203-203-85-9.dynamic.kbtelecom.net
203.203.85.137	PTR	host-203-203-85-137.dynamic.kbtelecom.net
203.203.85.140	A	host-203-203-85-140.dynamic.kbtelecom.net