> It can geolocate the address making the request and use that to determine the respone It can, but it tends to be a premium feature of specific DNS providers,

> It can geolocate the address making the request and use that to determine the respone It can, but it tends to be a premium feature of specific DNS providers, not a global/by-default feature of DNS as efitz seems to be alluding to. DNSimple supports it for example, but only on their "Professional" plan (and they call it "Regional Records") while others like Gandi don't support it at all.