You can register your residential telephone number on the National Do Not Call Registry at no cost by telephone or by internet.To register by phone, call 1-888-382-1222 or (TTY) 1-866-290-4236. You must call from the phone number you wish to register.To register by internet, you can access the National Do Not Call Registry web site at http://www.donotcall.gov/. To register by internet, you can access the State of Oklahoma Do Not Call Registry web site at http://www.oag.state.ok.us/consumer/TRAregistration.nsf/readme2!openpage or call 1-800-390-5708. You must call from the phone number you wish to register.Registering your residential phone number is free, and it will remain on the National Do Not Call Registry for five years. After this five-year time period, you can re-enter your phone number on the list. You can remove your name from the registry at any time.