I had a call from 801-785-4108 and I live in Utah, and the area code is 801 where I live and my prefix is 785.  The ID just showed the number.  It was some guy wanting to talk to me about solar panels.  I just said "sorry, not interested" and hung up.  I called the number back and it was disconnected.  Interesting - makes me wonder what number he really did call from.