Malaysian Postcode Regex for Python

What this pattern does

This page provides a lightweight, single-purpose regular expression for matching malaysian postcode, 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

# Malaysian Postcode
# ReDoS-safe | RegexVault — Localization > Postal Codes

import re

malaysian_postcode_pattern = re.compile(r'^[0-9]{5}$')

def validate_malaysian_postcode(value: str) -> bool:
    return bool(malaysian_postcode_pattern.fullmatch(value))

# Example
print(validate_malaysian_postcode("50000"))  # True

Test Cases

When to use this pattern

This pattern is drawn from the Localization > Postal Codes 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

Malaysian postcode ranges by state: Perlis 01000-02800, Kedah 05000-09810, Kuala Lumpur 50000-60000, Sabah 88000-91300, Sarawak 93000-98859. Pos Malaysia manages the database.