Just posted a solution to someone else who had the same problem. I searched the web and found a call blocking device (about the size of a caller ID box) from a company called Digitone Communcations. You simply plug it into your wall phone jack and then plug your phone into the device. By default it blocks OPX calls, which are Anonymous, Out of Area, Private, Unknown, or "X" calls that do not have a minimum 7 digit number displayed. I just installed it over the weekend and it already blocked the "Out of Area 201" number so that it did not ring on any of my phones. It works with traditional phones and with digital phone service offered by cable companies. You need caller ID service for the device to work. It costs about $100.00 (not too bad a price to pay for privacy) and it has a lot of other features including After Hours Mode, that you can program into the device just by using your phone to enter some simple codes. Hope this helps.
I just picked up a call from this number which read on my caller id "Bayonne NJ" and spoke with someone who said they were with the Kennedy Center (in Washington D.C.), which I have been a sustaining member of in the past. He asked if I had been down to the center in recent months etc and I stopped him and informed him that I have not, and that now is not a good time for me to contribute as I lost my job in December. He wished me well and quickly got off the phone without any other options that are usually proposed at that point of a contribution conversation(e.g."well, ma'am, if the old amount doesn't work for you, how about a 5 or 10 dollar contribution?"). The reason I think it is even more curious is that another poster to this thread said that the caller he/she spoke with mentioned Habitat for Humanity. Perhaps this caller solicits on behalf of a number of charities, but I would definitley be leary.