The National Do Not Call Registry gives you a choice about whether to receive telemarketing calls at home. Most telemarketers should not call your number once it has been on the registry for 31 days. If they do, you can file a complaint at this Website. You can register your home or mobile phone for free. Your registration will be effective for five years. Many of us signed up in 2003, so our numbers will fall off the list in 2008. You can re-register, here https://www.donotcall.gov/register/Reg.aspx and your will be on the Do Not Call list for 5 more years. You can register all personal phone numbers including cell phones. If you have more than 3 numbers to register, you will have to submit each group of 3 separately.