Who called from 3012404102

This number seems definitely spoofed.  I've never seen a 240 exchange within a 301 area code.  The call came to my cell and I didn't answer and no message was left on 10/4/14 at 2:07PM.

Didn't answer; no message left. How'd they got my cell number anyway?

spoofed.  301 240-4102.   burglar ring? breaks in houses.  locate track persons by gps phone.

There is a 301 240 exchange, but the 4100 block of extensions is currently unassigned. This as a spoofed ANI. This block is unassigned in the NANPA database.

this  number has started calling me recently on cell - doesn't leave a message