Not only is it not a call blocker, but Charities are exempt from the DNC along with Political and some survey's. Consider maybe getting a call blocking device or phone.. You can google them and many are around $50.00 or less.
I am so annoyed with this caller. Stop dialing my number or leave a message. If it's a collector/soliciter, be considerate and leave a message for your call and you may get a return call back. You could be calling a tax payer/bill paying person and the real culprit gave a bogus number to get out of paying their debt... DAH!