Germany Postal Code Format Guide
German Postleitzahlen (PLZ) contain five digits. Leading zeroes are significant, so postal codes must be stored as strings rather than numbers.
Standard format
NNNNN
Example
10115
Implementation and validation notes
German Postleitzahlen (PLZ) contain five digits. Leading zeroes are significant, so postal codes must be stored as strings rather than numbers.
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 Germany postal code format?
A common representation is NNNNN, for example 10115. German Postleitzahlen (PLZ) contain five digits. Leading zeroes are significant, so postal codes must be stored as strings rather than numbers.
How should Germany 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.