Australian Phone Number Regex for JavaScript

What this pattern does

This page provides a comprehensive, battle-tested regular expression for matching australian phone number, ported and verified for JavaScript. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your JavaScript project — whether you're validating in an Express middleware, a Next.js API route, or a client-side form.

Javascript Implementation

// Australian Phone Number
// ReDoS-safe | RegexVault — Localization > Phone Numbers

const australianPhoneNumberRegex = /^(?:\+61|0)(?:\s|-)?(?:[2-578])(?:[\s.-]?[0-9]{4}){2}$|^(?:\+61|0)4[0-9]{2}(?:[\s.-]?[0-9]{3}){2}$/;

function validateAustralianPhoneNumber(input: string): boolean {
  return australianPhoneNumberRegex.test(input);
}

// Example
console.log(validateAustralianPhoneNumber("+61 2 9374 4000")); // true

Test Cases

When to use this pattern

This pattern is drawn from the Localization > Phone Numbers category and carries a ReDoS-safe certification. That matters for JavaScript developers because especially critical in long-running Node.js event loops where a ReDoS vulnerability can block the entire process. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

Australian area codes: 02 (NSW/ACT), 03 (VIC/TAS), 07 (QLD), 08 (SA/WA/NT). Mobile numbers start with 04 (04xx = 10-digit mobile). 05 is reserved. +61 replaces the leading 0.