What is a private use network, and why can it be traced?
Private Use networks incorporate IP addresses that are reserved for internal use. When a traceroute is run, the IP address will go through a IP management utility which will change the IP address to enable it to be used externally. In DesktopPerspective, for any hops on a private use network the geographical location will not be shown, as these use pseudo IP addresses. All the other hops should work, if there are no firewalls or proxy servers in place.