ZIP code regex Python
ZIP code (US postal code) regular expression can be used to verify if a given string contains a valid ZIP code or extract ZIP code from a string. Supports both 5-digit and 9-digit (ZIP+4) formats.
ZIP code regex
A regular expression to test a string against ZIP code format:
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/^[0-9]{5}(?:-[0-9]{4})?$/
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Example code in Python:
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True
False
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Test it!
True
False
Enter a text in the input above to see the result
Notes on ZIP code validation and extraction
This ZIP code regex has several limitations:
- It only works for US ZIP codes. If you need to support other countries, you might need to have a separate regular expression for each one of them and execute it based on the country provided.
- It can not guarantee that ZIP code actually exists. For instance, 99999 is a correct format, but this ZIP code does not exist.
- The extraction method can generate false-positive extraction if a string contains multiple numbers.