How to Block 800 Numbers

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Receiving unwanted phone calls from 800 numbers is one of the irritating results of having a telephone number. The phone always seems to ring right in the middle of dinner or during a favorite television show. Now there is a way to put an end to these calls for good. Blocking calls from 800 numbers can be done over the phone or online through he National Do Not Call Registry.

Register Over the Telephone

Call 1-888-382-1222 from the phone number that is to be registered. When calling from a touch tone phone follow the computer prompts. When calling from a rotary phone stay on the line to wait for an agent's assistance with the registration process. On a touch tone phone, select the preferred language by following the prompts. Press "1" for English or "2" for Spanish. Follow the next prompt to enter the phone number by pressing "1." Now enter the 10-digit phone number including the area code. After entering the phone number the registration will be confirmed by the system.

Repeat for Additional Numbers

Repeat the above steps to register additional phone numbers. Up to three phone numbers may be registered, including cell numbers, but each call must be made from the individual phone number that is being registered. For added assurance that the registration was successful, the same number (1-888-382-1222) can be called back to verify that a number is on the registry.

Register Online

Go to and click on the "Register Now" button. Enter the area code and phone number in the appropriate fields. Up to three phone numbers, including cell numbers, can be registered. The Federal Trade Commission operates the service and there's only one registry; there is no separate registry for cell phones. Enter an email address in the appropriate field and then re-enter the email address to confirm. Double check to be sure the proper number or numbers have been entered and to make sure the email address is correct. If everything looks good, click the "Submit" button.

Verify the Registration

Go to the email account and look for a message from There will be one message for each phone number to be registered. Open the email and click on the included link and the registration will be complete.

Understand the Limitations of the System

Understand that the Do Not Call Registry will block sales calls to the numbers you've registered. It does not block debt collection calls, charitable calls, political canvassing or telephone surveys. An organization is also permitted to call you if you have recently done business with them, or you've given them permission to call, for example, by filling out an online registration form. To prevent these types of calls, you must call the business directly and ask them to stop contacting you. The business is required to honor your request.

Blocking Numbers on Your Cell

Most cell phone accounts prove a way to block undesirable numbers. Each phone has a different system but generally, you should have an option that allows you to set your cell phone's "blocking" feature. Some carriers will let you log into your account and add all the numbers you wish to block; other times you'll have to do it from your device as each call comes in. The block may be temporary, so be sure to review it at periodic intervals.


  • A number can be removed from the registry by calling 1-888-382-1222 from the telephone number to be deleted.



About the Author

Laura Payne has been freelance writing for several online publications in her free time since 2006. She holds a Master of Arts in linguistics from Wayne State University and a Bachelor of Arts in journalism from Oakland University. Payne teaches linguistics classes at both universities on an adjunct basis.