How to Check a Phone Number's Validity

By Karen Kramer

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.

Step 1

Go to the Phone Validator website (

Step 2

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

Step 3

Click on the "Search" button.

Step 4

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

Step 5

Review the results.