What is phone validation?

Phone validation is the process of checking if a phone number in your database is accurate and valid. It clarifies if a number is active and able to receive calls and texts. It can distinguish real phone numbers from fake ones.

Install

npm install phone-validation-lib

// or

yarn add phone-validation-lib

Usage

const {phone-validation-lib} = require('phone-validation-lib');

// or

import {phone-validation-lib} from 'phone-validation-lib';

1. Simple usage

phone('+852 6569-8900');
// { isValid: true, phoneNumber: '+85265698900',  countryIso2: 'HK', countryIso3: 'HKG', countryCode: '+852' }

2. With Country

phone('(817) 569-8900', {country: 'USA'});
// { isValid: true, phoneNumber: '+18175698900', countryIso2: 'US', countryIso3: 'USA', countryCode: '+1'}

phone('(817) 569-8900', {country: 'HKG'});
// { isValid: false }
// not a valid HKG mobile phone number

phone('+1(817) 569-8900', {country: 'HKG'});
// { isValid: false }
// not a valid HKG mobile phone number

phone('6123-6123', {country: 'HKG'});
// { isValid: true, phoneNumber: '+85261236123', countryIso2: 'HK', countryIso3: 'HKG', countryCode: '+852' }

3. Without country code and no phone prefix

If both country code and country phone prefix are not provided, the phone number will be treated as USA or Canada by default.

phone('(817) 569-8900');
// { isValid: true, phoneNumber: '+18175698900', countryIso2: 'US', countryIso3: 'USA', countryCode: '+1' }

phone('(817) 569-8900', {country: ''});
// { isValid: true, phoneNumber: '+18175698900', countryIso2: 'US', countryIso3: 'USA', countryCode: '+1' }

phone('780-569-8900', {country: null});
// { isValid: true, phoneNumber: '+17805698900', countryIso2: 'CA', countryIso3: 'CAN', countryCode: '+1' }
// 780 is a Canada phone prefix

phone('6123-6123', {country: null});
// { isValid: false }
// as default country is USA / CAN and the phone number does not fit such countries' rules

4. With country code / phone prefix, but no + sign

Even you input a valid phone number with a valid prefix, if there is no plus sign, it will not work as expected:

phone('85291234567');
// or
phone('85291234567', {country: null});

// { isValid: false }

852 is a valid Hong Kong phone prefix, and 91234567 is a valid Hong Kong mobile phone number. However, there is no plus sign provided, the module will assume the phone number is a USA or Canada phone number, hence no result will be found.

If you know you have provided country phone prefix, make sure you also provide a plus sign:

phone('+85291234567');
// or
phone('+85291234567', {country: null});

// { isValid: true, phoneNumber: '+85291234567', countryIso2: 'HK', countryIso3: 'HKG', countryCode: '+852' }

or, if you know the country, and only want to reformat the phone number to E.164 format:

phone('91234567',  {country: 'HKG'})
// { isValid: true, phoneNumber: '+85291234567', countryIso2: 'HK', countryIso3: 'HKG', countryCode: '+852' }

5. Skipping phone number initial digit checking

If you want to skip phone number initial digit checking, set validateMobilePrefix to false:

phone('+(852) 2356-4902');
// { isValid: false }
// '2' is a Hong Kong landline phone number prefix, not a valid mobile phone number prefix

phone('+(852) 2356-4902', {validateMobilePrefix: true});
// { isValid: false }
// same as above, default value of validateMobilePrefix = true

phone('+(852) 2356-4902', {validateMobilePrefix: false});
// { isValid: true, phoneNumber: '+85223564902', countryIso2: 'HK', countryIso3: 'HKG', countryCode: '+852' }
// skipping mobile prefix checking

With validateMobilePrefix set to false, the initial digit checking logic will be disabled completely, even you enter a phone number start with a non-exist digit:

phone('+(852) 0356-4902', {validateMobilePrefix: false});
// { isValid: true, phoneNumber: '+85203564902', countryIso2: 'HK', countryIso3: 'HKG', countryCode: '+852' }
// even the phone number start with `0` is not a valid landline phone number

Note that the module does not have the capability to determine if the prefix is a valid landline prefix number.

6. Trunk Code Detection Logic

For some phone numbers, such as this sample UK phone number:

+44 07911 123456

There is a trunk code 0 after the country code +44 so that it is unable to match any correct country.

Hence the module will try to remove 1 digit after the country code,

and try to detect:

+44 7911 123456

and it would become a valid UK phone number now.

phone('+4407911 123456')
// { isValid: true, phoneNumber: '+447911123456', countryIso2: 'GB', countryIso3: 'GBR', countryCode: '+44' }

If you want to disable this behavior, please set strictDetection to true:

phone('+4407911 123456', {strictDetection: true})
// { isValid: false }

License

This project is licensed under the MIT license.