Best would be to do a traceroute and see where the IP goes to if you like post the results here and take out your servers IP at the end if you don't want people knowing the IP.
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Ping is not useful to geo-locate a server. Traceroute your server's IP address and take note of each hop throughout the final steps of the route in order to identify your router or gateway physical presence. Most providers identify their routers with city initials.