Worried that your Internet traffic is taking an unnecessarily circuitous path to you, ruining your performance by forcing you to wait too long when you request webpages or by causing "life" threatening lags in your favorite games? Suspicious about what networks or countries might handle your traffic along its journey? Want to know if your provider is getting you the performance you are paying for? Just curious to see where data is coming from? For these questions and more, our new reverse traceroute system is just the tool you need! It allows you to measure the path from any destination back to a host running our software.

This webpage allows you to demo our new system. Select a test source from the drop-down list (perhaps the one nearest you), enter the destination of your choice (either an IP address such as 72.14.213.104 or a hostname such as google.com), enter your email address, and then launch the measurement. We will email you the result shortly. If you actually control the "destination" you are inputting, please issue a traceroute to the measurement source you are selecting, then cut-and-paste the traceroute into this box to aid us in improving our system. Note that, if you enter a hostname (rather than IP address) for the destination, the resolution will happen at University of Washington and may yield a different address than it would at your location.