The easiest way to cut down on these calls is to put yourself on the Do Not Call registry -- then report any violators to the Federal Trade Commission at www.donotcall.gov. National Do Not Call -- To register by phone, call 1-888-382-1222 (voice) or 1-866-290-4236 (TTY). After your number is on the registry for 31 days, you can report unwanted sales calls. Robocalls: Report calls that use a recorded message instead of a live person (whether or not your number is on the Registry). Tell the FTC what the call was about (debt reduction, home security, vacations, etc.) Reminder: Even if your number is registered, some organizations may still call you, such as charities, political organizations, and telephone surveyors.