You can also register at The National Do Not Call Registry. You set your numbers (home, mobile, business, etc.) for life. The list is to advise telemarketers, under penalty of law, numbers that are not available for their business calls.
While the information is advised, calls can still happen. Also, businesses you are client of can still call, though you can request removal from their lists just by asking. https://www.donotcall.gov/
I hope this helps.