Why would this be so.
I have a number of separate IP ranges which are map scanned nightly for devices not in subscription.
Every now and again I'll discover a device with a fairly random IP, which clearly belongs to a major internet service provider here in Australia.
For example, tonight I discovered a device "203.50.x.x" - belonging to an ISP, and this is NOT in any way part of the network ranges I am trying to scan? Why then is this suggested as a new discovered device? is it merely "in path" to something I am trying to scan?