getRegionCodeForNumber

getRegionCodeForNumber(number) is used to gets the region where a phone number is from.

Usage

Using Standard JavaScript:

// Create an instance of PhoneNumberUtil

const phoneUtil = require('libphonenumbers').PhoneNumberUtil.getInstance();

// Parse number with US country code and keep raw input

const number = phoneUtil.parseAndKeepRawInput('202-456-2121', 'US');

// Get region code of number

console.log(phoneUtil.getRegionCodeForNumber(number));

// US

Using ECMAScript (ES):

import libphonenumbers from 'libphonenumbers';

// Create an instance of PhoneNumberUtil

const phoneUtil = libphonenumbers.PhoneNumberUtil.getInstance();

// Parse number with US country code and keep raw input

const number = phoneUtil.parseAndKeepRawInput('202-456-2121', 'US');

// Get region code of number

console.log(phoneUtil.getRegionCodeForNumber(number));

// US