IP address use area identifying system

Abstract

Provided is an IP address use area identifying system, including: a communication path detection unit 11 detecting a communication path including router passing information; and an area identifying unit 12 identifying an area from an IP address of a router located at an end of the detected communication path, with reference to IP address use area information in which the IP address is associated with the area in which the IP address is used, in which when the area identifying unit 12 identifies the area, an extent of the area identified from the IP address is varied on the basis of the number of routers included in the detected communication path, by utilizing a network characteristic that the number of routers to be passed through when a communication path can be detected up to a transmission source user terminal (up to a terminal end of the communication path) becomes a prescribed number, and thus, even when the communication path is not capable of being traced up to the transmission source user terminal, the area based on the IP address of the router located at the end of the detected communication path can be identified, in an extent corresponding to the number of routers included in the communication path up to the farthest traceable point.

Dependencies are inferred from the claim text.