How to Check a Phone Number's Validity

You can verify a phone number's validity before making a call, whether the number is listed on a paid lead form or written on the back of a napkin, or an unknown number on a caller ID. There are paid and free services that will complete a reverse look-up, checking the number's validity and listing the phone's registered owner.

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Use a reverse number service to validate phone numbers.

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Go to the Phone Validator website (http://phonevalidator.com/).

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Enter the phone number in the "Enter Phone Number" box.

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Click on the "Search" button.

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Click on "Click Here for Results," next to the "Directory Assistance Results" column.

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Review the results.