As usual, these "phone numbers" are a ploy and why our US Gov't doesn't  do something to put an end to it is beyond me. But of course, our "do nothing" FCC, who monitors the "Do Not Call List",nothing ever gets done.  Both my cell phone and home phone are unlisted but still these hackers find a way to get into them!  I have changed both numbers twice in the past year and still I get these constant annoying calls at all hours of the day and night.  I suppose not having a phone is the solution.  I even considered UHF mobile phones but it is rare that someone would have one for my transmissions as well as my creditors or family members to communicate with!  Even trying to block these calls is almost impossible.  When will it ever end; probably never most likely!!!!