How to block an unknown caller

Written by kenyonda bradley
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How to block an unknown caller
Stop unknown callers from contacting you by subscribing to a call blocking service. (angry businessman looking at the phone image by Nikolay Okhitin from

Receiving calls from unknown numbers can be annoying and stressful. Unfortunately, since the proliferation of telemarketing companies, having your phone ring several times from an unknown number is common. Fortunately, many telecommunications companies have implemented features to stop unknown calls on your home phone. In addition, if you have a cell phone, it is easier to stop that annoyance from even reaching your line.

Skill level:

Things you need

  • Call blocking service

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  1. 1

    Sign up for an anonymous call rejection service through your home phone service. To activate the service, dial “77” from your home phone. This will alert the caller that you do not accept anonymous calls. To disable the service, dial “87.”

  2. 2

    Add a call screening service to your home phone plan. Configure the call screen feature to block all unknown or private numbers. Once enabled, callers will hear a message asking them to identify themselves or the company they are calling from.

  3. 3

    Add your home phone number to the national “Do Not Call” registry. This will prevent most telemarketers from calling your home phone. (See Resources.)

  1. 1

    Read your cell phone user manual and check if they there is a feature to block unknown calls from coming through on your phone. Most smart phones have this option.

  2. 2

    Call your wireless carrier and inquire about services available to restrict unknown callers. Be aware that you maybe charged a monthly fee to subscribe to the service.

  3. 3

    Add your cell phone number to the national “Do Not Call” registry. This will prevent most telemarketers from calling your mobile phone. (See Resources.)

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