1-2 times a day I receive calls from 202-652-4580. Today I dialed the number and received an automated system stating they are a "Political and Non-profit organization" through out the USA. Next I was directed to the "outbound do not call list". I accepted this option, entered my ten digit telephone number and was informed that my information was received and my number will be processed on the "do not call register" within the next 48 hrs. Hopefully this helps others!