Jimbee

I am really annoyed at all the phone solicitation and would like to be able to hook up a device between my phone and the jack that would allow me to input numbers by keypad and store them and when a phone call comes in, the device would check the numbers on a chip to the number that just called for a match and stop the phone from ringing. My phone only allows for 20 blocked calls and there are so many more I need to block. Thanks for the help. Anyone who comes up with the circuit should win the Nobel Peace and Quiet Prize. ;D