How to Block a Number From a Landline Phone

by Frances Todd
telephone 1 image by Aussiebloke from

Telemarketers or harassing calls are just two reasons why a person might need to block incoming calls. Telemarketers, for example, are forbidden by law to mask their phone numbers to try and get around call blocking or caller ID. While call blocking is readily accessible on cell phones, you can also easily block calls on a land line.

Step 1

Contact your service provider. Before doing anything else, you should contact your phone service provider by phone or email to ask about its available options. Many companies have call blocking services available for subscribers. Ask if anything is available on your plan and also make your sure you inquire about any additional charges before activating a blocking option.

Step 2

Press a code. Many companies, including Verizon, use the code *67 to activate call blocking. Other providers, such as AT&T, use *60.

Step 3

Input the number you wish to block. Some carriers will also block a given number for your line specifically if you contact the service provider yourself.

Learn how many numbers you're allowed to block. Some carriers restrict how many phone numbers you can block on your land line. AT&T, for example, allows a person to block up to six numbers on a land line.


  • Remember to wait for a dial tone before pressing a code such as *67.
  • Some carriers, such as AT&T, also allow call blocking on anonymous numbers.


Photo Credits

About the Author

Frances Todd has been a writer since 1998. Her works have appeared in "Women's World" and online at WebMD. She has written online instructional articles since 2008. Todd has a Bachelor of Arts and a Master of Science in history, both from the University of Iowa, and currently works in criminal law.

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