How to determine the user's approximate location by IP?


When I use search engines for certain searches, mainly related to maps or commercial establishments, these systems usually provide me with results relevant to my geographic location.

When I'm on the PC, search engines may not even know my geographic position with GPS accuracy, but they at least know which city I'm in.

I believe this is determined by the IP address, as generally a specific address range is provided by the provider for very specific regions.

But at the level of implementation, how is this determination made? Is there a formula to determine the user's city or region based on their address? Or at least a known provider from which we can consume a service to obtain this information?



This is actually very simple and works like this:

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