ZIP/Postal Code Format Reference
Reference postal and ZIP code formats with examples for major countries.
Postal/ZIP code formats by country, with a real-looking example. Format rules occasionally change — verify against the national postal authority for critical use.
About this tool
ZIP/Postal Code Format Reference is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
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