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A comment on Lies vs. Statistics: VPN Virtual Server Locations. Parent comment

Re:Lies vs. Statistics: VPN Virtual Server Locations by mirimir on Wednesday January 01, 2020 @10:29PM (#21932782)
That's a good point.

But I don't know how geofences avoid being tricked. Maybe they check signal velocity. I would, anyway.

And then there's the use of residential IPs for geofence tricking. But those are pretty clearly where claimed.

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Re:Lies vs. Statistics: VPN Virtual Server Locations by donavanm on Thursday January 02, 2020 @09:36PM (#21942555)
Usually its a precomputed list at run time. Think of a tree that goes from network address to locale(s). More specific network prefixes (probably) have more specific locales.

Companies like MaxMind collect and repackage this based off of information like RIRs, SWIP, DNS PTRs, or even end user billing/shipping addresses in online transactions. I dont think latency is used too much these days. Check out https://www.maxmind.com/en/geoip2-databases for some examples. I'd say that level of detail is about industry standard and most companies would simply pay maxmind or another vendor for this data.

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