isPossibleNumber vs. isValidNumber

Question

I am using Google's libphonenumber library to validate phone numbers on the server-side and I noticed that PhoneNumberUtil has two methods for doing this: isPossibleNumber and isValidNumber. What is the difference between them and when should I be using one rather than the other one?

Cureton

Answer 1

You can find their difference in their github page.

isPossibleNumber - quickly guessing whether a number is a possible phonenumber by using only the length information, much faster than a full validation.

isValidNumber - full validation of a phone number for a region using length and prefix information.

Bale

This means that using both isPossibleNumber and isValidNumber is more performant than just using isValidNumber alone if you have invalid numbers in your list? – Adna