I have been entering my phone numbers into the register for at least twenty years. It seems that in the beginning it worked somewhat, but then it returned to th

I have been entering my phone numbers into the register for at least twenty years. It seems that in the beginning it worked somewhat, but then it returned to the same level of spam calls. In the last five years, the number of unwanted calls has increased dramatically, coming mostly from over seas call centers and computerized robo-calls. I will continue to update the registry periodically just because it may be doing a little bit of good, but I really don't know how much that is.