Got a call from this faked caller ID numbr this morning.  They left no message on my answering machine.  We have received calls from several 502-0xx-xxxx numbers in the past week.  Tried calling several back, the numbers are not legal phone numbers, because of the zero.  So the telemarketers or scammers are using fake number ID.  When is this going to stop?  I guess home phone service will end soon, this does not happen on our cell phones, or at least very infrequently.  We get several of these calls per day on the home phone.  All are listed on the DNC list.