mobile-sg-validator

Type-safe international mobile phone number validation for 200+ countries.

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Installation

npm install mobile-sg-validator

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Usage

Simple validation (boolean)

import { validateMobileNumber } from 'mobile-sg-validator';

validateMobileNumber('+919876543210');  // true  — India
validateMobileNumber('+447911123456'); // true  — United Kingdom
validateMobileNumber('+1234');         // false
validateMobileNumber('notanumber');    // false

Detailed validation

Returns full country info including country, country_code, country_name, and mobile_number:

import { validateMobileNumberDetailed } from 'mobile-sg-validator';

const result = validateMobileNumberDetailed('+918024571878');
// {
//   isValid: true,
//   country: 'IN',
//   country_code: '91',
//   country_name: 'India',
//   mobile_number: '8024571878',
//   formattedNumber: '+918024571878'
// }

const uk = validateMobileNumberDetailed('+447911123456');
// {
//   isValid: true,
//   country: 'GB',
//   country_code: '44',
//   country_name: 'United Kingdom',
//   mobile_number: '7911123456',
//   formattedNumber: '+447911123456'
// }

const bad = validateMobileNumberDetailed('+123');
// { isValid: false, error: 'Phone number is not valid' }

Access country patterns directly

import { countryPhonePatterns } from 'mobile-sg-validator';

const india = countryPhonePatterns['IN'];
console.log(india.code);         // '+91'
console.log(india.country_name); // 'India'
console.log(india.pattern);      // /^(?:\+91|91)?[-\s]?[6-9]\d{9}$/

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API

validateMobileNumber(phoneNumber: string): boolean

Returns true when the phone number is valid for its detected country.

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validateMobileNumberDetailed(phoneNumber: string): ValidationResult

Returns a detailed result object:

interface ValidationResult {
  isValid: boolean;
  country?: CountryCode;        // ISO 3166-1 alpha-2, e.g. 'IN'
  country_code?: string;        // Numeric dialing code, e.g. '91'
  country_name?: string;        // Full country name, e.g. 'India'
  mobile_number?: string;       // Local digits only, e.g. '8024571878'
  formattedNumber?: string;     // E.164 format, e.g. '+918024571878'
  error?: string;               // Present when isValid is false
}

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countryPhonePatterns

A Readonly<Record<CountryCode, CountryPhonePattern>> map.

interface CountryPhonePattern {
  code: string;         // Dialing code, e.g. '+91'
  country_name: string; // Full country name, e.g. 'India'
  pattern: RegExp;      // Validation regex for E.164 numbers
}

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CountryCode

TypeScript union type of all 200+ supported ISO 3166-1 alpha-2 country codes.

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Supported Countries

200+ countries including 🇮🇳 India, 🇺🇸 USA, 🇬🇧 UK, 🇨🇳 China, 🇩🇪 Germany, 🇫🇷 France, 🇯🇵 Japan, and many more.

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License

MIT © 2026 Sangram Ghadage