Yes it is true. It is possible to trace any website using your own router. Most of you must be knowing that there is a command ping through which we can check the network between two nodes.
Actually some data packet is sent from one node and that packet is received and sent back by other node if there is successful network connection between them and time taken for process can be retrieved at first node. Actually ping term originates from SONAR.
There is one more networking command tracert which is much more dirtier than ping. This can be utilized to trace the network through your router.
Note that for the site you want to trace, you must be knowing the IP of that site. Its easy to retrieve IP at websites like http://www.selfseo.com

• Open command prompt window by typing cmd in run window.

• Enter command tracert and desired IP.

• Now you can see the route of your network.

• It depends upon the ISP that if there is location name or server name or just IP address while tracing the network.

• But you can know the location of IP address at sites like www.ip-adress.com