Now generally I like my cell phone carrier, Verizon, but they charge 5 bucks a month to use the "block this number" feature. I pay plenty every month to use my cell phone, if I want to block a number it shouldn't cost me extra!
So anyway, the National DO NOT CALL list does exist and I got the phone number from the lovely Verizon lady who wanted to charge me $5 a month to individually block every number that keeps calling. I am sharing it with you because it takes 31 days to get the list out and affirm that these people are not going to call you and this is information you should be able to access freely.
It took me 3 minutes to get my number on the list, if that.
3 minutes to prevent 20-30 random phone calls each week... Probably worth it. Just saying...