France Postal Code Format Guide
French codes postaux contain five digits; the opening digits usually correspond to a department. Overseas departments and special routing require exceptions to simple mainland assumptions.
Standard format
NNNNN
Example
75001
Implementation and validation notes
French codes postaux contain five digits; the opening digits usually correspond to a department. Overseas departments and special routing require exceptions to simple mainland assumptions.
Validate required state, character set, length, and syntax on the client, then repeat validation on the server. Preserve the original input and normalize into a separate field; never truncate local scripts, compound names, or leading zeroes to fit a single Western assumption.
This guide describes common formats rather than an official registry and cannot enumerate every exception. Generated output is for testing only, not delivery, calling, identity verification, or real account activity.
Related resources
Frequently asked questions
What is the standard France postal code format?
A common representation is NNNNN, for example 75001. French codes postaux contain five digits; the opening digits usually correspond to a department. Overseas departments and special routing require exceptions to simple mainland assumptions.
How should France postal code test data be stored?
Store the original value as a string so leading zeroes, spaces, hyphens, accents, and local scripts are preserved. Use a separate normalized field for search.
Does correct formatting prove the data is real?
No. Syntax validation cannot prove an address is deliverable, a number is assigned, or a name belongs to a real person.