The 'Google Voice Number Lookup' app is made to expose the unknown Google Voice number. This search is easy and takes no time. So, if you are being disturbed by constant calls, you need to enter theGoogle voice phone number into the Google Voice Number Lookup tool, which is free to use, and begin the process. The moment you enter the phone number. You will be taken to a different page where all activities will take place. It can take 3 minutes to display all the information and give you a report with all the details about the Google Voice number in question in minutes.