Robtex

Up: 203.203.216.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.203.220.0/23
Down right: 203.203.222.0/23

IP	Type	Hostname
203.203.223.10	PTR	host-203-203-223-10.dynamic.kbtelecom.net
203.203.223.21	PTR	host-203-203-223-21.dynamic.kbtelecom.net
203.203.223.24	A	host-203-203-223-24.dynamic.kbtelecom.net
203.203.223.120	A	host-203-203-223-120.dynamic.kbtelecom.net
203.203.223.121	A+PTR	host-203-203-223-121.dynamic.kbtelecom.net
203.203.223.146	PTR	host-203-203-223-146.dynamic.kbtelecom.net
203.203.223.155	PTR	host-203-203-223-155.dynamic.kbtelecom.net
203.203.223.167	A	host-203-203-223-167.dynamic.kbtelecom.net