Recieved a call from 1-202-495-7158 on an unlisted number. Apparently I have done business with a company that is selling/giving out my private number. I began recieveing telemarketing calls shortly after renting a movie at Movie Gallery (you must give a working phone number to rent a movie).
I would suggest not answering the phone when they call, Last month my friend got a call from these people, stayed on the phone about 3 minutes or so and got charged $20 for the call.