No. Your number will stay on the Do Not Call list unless you direct the Federal Trade Commission to remove it. The FTC no longer requires people to sign up every 5 years. (It is not necessary to register cellphone numbers, since telemarketing to them is illegal.) Sign up at the FTC website, or call 1-800-382-1222. Check, too, to see if your state has a no-call list. Despite the lists, it's impossible to stop all telemarketing call. The best thing to do is hang up and report the offender's number to the FTC. To file a complaint go to and click on the "File A Complaint" button and follow the instructions.