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by ericdiao 185 days ago
Another related but non-VPN story related to IP geolocation:

Big techs (most notably Google) is using the location permission they have from the apps / websites on the user's phones / browsers to silently update their internal IP geolocation database instead of relying on external databases and claims of IP owners (geofeed etc). And this can be hyper-sensitive.

I was traveling back home in China last year and was using a convoluted setup to use my US apartment IP for US based services, LLM and streaming. Days into the trip and after coming back, I found that Google has been consistently redirecting me to their .hk subdomain (serving HK and (blocked by gov) mainland China), regardless of if I was logged in or not. The Gmail security and login history page also shows my hometown city for the IP. I realized that I have been using Google's apps including YouTube, Maps and so on while granting them geolocation permission (which I should not do for YouTube) in my iPhone while on the IP and in my hometown.

After using the same IP again in the US with Maps and so on for weeks and submitting a correction request to Google, it comes back to the correct city. (The tricks of restarting the modem / gateway, changing MAC address to get a new IP is not working somehow this time with my IS.
1 comments
reincoder 184 days ago
Some of our (IPinfo) services are hosted on GCP, and because our service is widely used (with 2 trillion requests processed in 2024) people sometimes say they cannot access our service. It is usually due to how Google's device-based IP geolocation is used. The user's IP address is often mistakenly identified as being located in a country where Google does not offer service.

I have seen a Europe-based cloud hosting provider's IP ranges located in countries where Google does not provide service. This is because these IP ranges are used as exit nodes by VPN users in that country.

Device-based IP geolocation is strange. We prefer IP geolocation based on the last node's IP geolocation. We hope to collaborate with Google, Azure, and other big tech on this if they reach out to us.

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ericdiao 184 days ago
Yeah. This can be a problem.

The device-based IP geolocation, because the algo is so sensitive and the result can be altered with few devices behind the IP (at least for Google), can be used theoretically steering / trick big techs to believe that the IP is at location it is not, just like VPN providers in your article by publishing "bogon" geofeed etc. This defies their purpose of doing this in the first place: geolocking and regulatory requirements.

The "tech" is already there: browser extensions [1] that overwrite the JS GeoLocation API to show "fake" locations to the website (designed for privacy purpose). also dongles are available on gray market that can be attached to iPhone / Android devices to alter the geolocation API result by pretending it is some kind of higher precision GPS device but instead providing bogon data to the OS. Let alone after jailbreaking / rooting your device, you can provide whatever geolocation to the apps.

[1] https://github.com/chatziko/location-guard

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