No, I have not missed the point. Your question does not mention specific devices: ‘All geolocation services appear to resolve my IP address to..’. Sure people will give nonspecific answers to that. Nevertheless my suggestion stands - check locations on mobile devices with GPS trackers while connected to your WiFi and Ethernet. It is not clear whether you tried to self locate on a mobile phone map. It is not clear whether all devices' location is wrong or just some or all stationary devices without GPS. ... View more

I guess you are talking about Google geolocation, because that defines advertisements. To check that, start Google Maps and click the location icon.   I noted location changes sometimes depending on who uses WiFi on an NBN account. For example, I live in Sydney Northern Beaches. A house mate who used WiFi most travelled to Melbourne. The Sydney NBN geolocation moved to .. Sydney airport and got stuck there!   I guess Google defines location from ISP, IP blocks as well as devices with GPS trackers, such as mobile phones, iPads, iMacs, Microsoft Surfaces etc and matches them with modem and IP. The trouble for Google is that most PCs do not have GPS. It is a mystery what triggers changes when multiple users are in the house. Who is the location identifier - a user who uses mobile with GPS more or the one who uses NBN most or it is everaged in the group ?   My suggestion, try to login to a Google account on your mobile, make sure Location is on, connect to WiFi and keep keep it for few days. ... View more