This is a spoofed number, pirated from a block of numbers actually assigned to Davison Army Airfield at Fort Belvoir, VA. The aviation detachment there runs a helicopter taxi service for generals quartered at Fort Belvoir, primarily to the Pentagon. The pirates have robo-called on nearly every number in the (703) 664-12xx block. They are also profoundly demented, as all of the numbers have been blocked long ago, but these cretins persist in repeated calling.