Australian Phone Number Regex for Python

What this pattern does

This page provides a comprehensive, battle-tested regular expression for matching australian phone number, ported and verified for Python. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your Python project — whether you're validating in a Django view, a FastAPI endpoint, or a standalone data processing script.

Python Implementation

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

import re

australian_phone_number_pattern = re.compile(r'^(?:\+61|0)(?:\s|-)?(?:[2-578])(?:[\s.-]?[0-9]{4}){2}$|^(?:\+61|0)4[0-9]{2}(?:[\s.-]?[0-9]{3}){2}$')

def validate_australian_phone_number(value: str) -> bool:
    return bool(australian_phone_number_pattern.fullmatch(value))

# Example
print(validate_australian_phone_number("+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 Python developers because particularly important in Python web servers where CPU-bound regex operations can stall concurrent request handling. 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.