I have been saving all spam/scam numbers on my phone and am finding that they eventually recycle. This is a new one but most of the 30ish numbers that I have saved in a contact named SPAM are now about 80% of the spam calls.
I got a call fro 417-800-2331 I didn't answer but called the number back and got an automated response it gives you the option to speak to a representative or to have your number put on the do not call list. I did that so will see if it works.