Cell phones are usually equipped with caller ID. This feature allows users to identify anyone who is calling their phones. If a number looks unfamiliar to you, you may want to match the phone number to a name. You can put an end to the mystery of an unknown number by looking the number up on the Internet.
Go to a people-search website such as White Pages.
Navigate to the reverse phone area, or the "Search My Phone Number" section of the website. Enter the unknown number in the available box.
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Click on "Find." Wait for the database results to populate. The name of the unknown number will be displayed. The results will display land phone numbers as well as cell phone numbers.