The DNC call list doesn't work so well with scammers. They are operating illegally, so a legal registry is a joke to these thieves. Block them on your phone and move on.
They called, but they didn't leave a message. I used Reverse lookup & it said the call was from Tupelo Michigan. I called back. Some kind of "rewards program". It left me an option to put me on the "do not call list". So I, hopefully, took myself off the list.