I don't put my number on Craigslist and the last time I used that site was over 6 months ago.

I added my cell phone to donotcall.gov but I still get these damn calls.

Not a call blocker.  Just a list.  It will have no effect on any type of criminals or scofflaws.  Go to the site and read so you won't be expecting miracles from it. It only does what it was created to do.