I don't think that'd be possible with [Local number portability](http://en.wikipedia.org/wiki/Local_number_portability http://en.wikipedia.org/wiki/Local_number

I don't think that'd be possible with [Local number portability](http://en.wikipedia.org/wiki/Local_number_portability http://en.wikipedia.org/wiki/Local_number_portability). You can move your number anywhere, with a mobile number you can get a number anywhere, and with VoIP services, you don't even necessarily need to be in the US to get a US number. There's absolutely no way to verify the person actually lives where the number is supposed to be.