You can use Mozilla's free geolocation service based on crowd-sourced location data for hundreds of millions of Wi-Fi access points, cell towers, and Bluetooth

You can use Mozilla's free geolocation service based on crowd-sourced location data for hundreds of millions of Wi-Fi access points, cell towers, and Bluetooth beacons. The website has a zoomable world map of network location coverage: https://location.services.mozilla.com/map https://location.services.mozilla.com/map