If you are on the do not call registry, the robo calls, marketing calls, and scam calls. At this time it doesn't work. Some of the groups that made the robo calls, have learned that there are programs created to block robocalls so they have begun to make voice or personal calls instead. They are still a harrassment. Since Charge card companies, Facebook, and Google have "shared" personal information, I get all kinds of marketing calls, some from companies that aren't real. I even get messages and texts from marketers, and groups that I never gave my phone number to. I also get a lot of scam calls. I say enough is enough. There needs to be legislation passed that stops the "sharing" of all personal information. Read the information you get when you get privacy notices from the banks that your credit cards are through because you can opt out of most of the ways they share your information. The groups that call regarding political candidates and political parties don't get blocked by do not call lists.