You can have DNS with different answers provided to different locations. https://en.wikipedia.org/wiki/GeoDNS https://en.wikipedia.org/wiki/GeoDNS The issue sta

You can have DNS with different answers provided to different locations. https://en.wikipedia.org/wiki/GeoDNS https://en.wikipedia.org/wiki/GeoDNS The issue starts when you move from your hotspot to your wifi and keep the cached results. Or your ISP has a large address pool that's used between multiple states/countries. Or the caching DNS server gets a different answer than you would get directly. Or .... It's a mess.