I contacted the operator and she advised that there is not a listing for this # so it must be from the back end. If you call the number it indicates it is disconnected, which is because the number is set up as outgoing only. The operator said that when she got home yesterday there were 2 calls on her caller ID from a 202 area code.
When I did a reverse look up this is the results that were returned:
Search Date: Saturday, April 21, 2012 11:48 AM
Phone Number: 202-870-5604
Line Type: Landline
Phone Carrier: Cellco Partnership Dba Verizon Wire
County: Prince George's
Iatitude and longitude of this phone # returns the following website and to the following, http://www.marigoldtech.com/lists/co.php?clli-code=ADLPMDMT