Another day, another 'new', as yet unblocked-number call.  Picked up at second ring, silently, and just listened.  Dead air of a robocall.  Don't believe this is a real number; suspect there are no exchanges of "100."  Have been getting a slew of illegal pre-recorded msg calls hawking medical equipment from our own area code; suspect this might be one of them even though no msg played.  Now blocked.

Reports on other sites saying this is the "Free" Home Security System SCAM.  I wonder if ADT is circumventing the DNC with these calls under a 'no-name' proposal.  Or if this is just total SCAM.

Fake number. Called the # and got the please check number and try again recording.