[jimaek]

I talk a little about it in the article, but the main goal was to build something simple that works as proof of concept.

This brute force approach works much better than I expected as long as you have enough probes and a bit of luck.

But of course there are much better and smarter approaches to this, no doubt!

[tomtomtom777]

How did you know how well these results work?

You mention the quality several times in the article but it's not clear how this is verified. Do you have a set of known-location-ip-addresses around the world (apart from your home)? Or are we just assuming that latency is a good indicator?

[jimaek]

I run about 270 servers in verified locations as part of the Globalping network https://globalping.io/users/jimaek so I had plenty of targets to test

I tested against them, as well as other infrastructure I control that is not part of the network, and compared to the ipinfo results as well