I suspect yet another call from RM Source that was a spoofed Caller ID.  I'm now getting about three per day.   What is happening is that they need to verify your number as working.  So, rather than use their numbers with Caller ID, the make up fictitious numbers, preferably in your local area.  

They also use Caller ID blocking, which only LOOKS like there is no caller ID, when in fact that your phone provider DOES have a record.  If this keeps up, I may just order a record of who placed these calls and file suit, once it is worth my while.

Just received a call from them also - didn't answer as don't recognize the number - also they called home number that has no answering machine and I only use for outbound calls.  Only folks that don't know me would call that number.  Assuming either telemarketer or confused collections folks for the people that used to live here years ago.