How many digits is an Austrian postal code?

An Austrian Postleitzahl (PLZ) is always exactly four digits. Assigned codes run from 1000 to 9992, and the leading digit indicates a Bundesland routing zone.

How does the leading digit map to a Bundesland?

1 is Vienna, 2 and 3 are Lower Austria, 4 is Upper Austria, 5 is Salzburg, 6 is Tyrol and Vorarlberg, 7 is Burgenland, 8 is Styria, and 9 is Carinthia. Zones 5 and 6 are shared because some states span two leading digits.

Why is the state only approximate near borders?

Routing zones follow postal-sorting logic rather than exact administrative borders, so a handful of towns close to a state line carry a PLZ whose leading digit belongs to the neighbouring zone. Treat the mapping as a strong hint.

Does a valid format mean the PLZ is in use?

No. This tool checks the four-digit format and zone only. A well-formed code can still be unassigned, so confirm against Österreichische Post's official directory if delivery accuracy matters.

Is my postal code sent anywhere?

No. Validation and the lookup run entirely in your browser. Nothing leaves your device.

Austria PLZ Validator

An Austrian Postleitzahl (PLZ) is the 4-digit postal code used to route mail and parcels across Austria. Codes run from 1000 to 9992, and the leading digit splits the country into nine routing zones that broadly correspond to the federal states (Bundesländer). This free tool validates the format and maps the code to its Bundesland zone in your browser.

How it works

Strip whitespace; the input must be exactly four digits.
Reject any value below 1000 or above 9992, the assigned bounds.
Read the leading digit and map it to a Bundesland routing zone:
- 1 → Wien,
- 2/3 → Niederösterreich,
- 4 → Oberösterreich,
- 8 → Steiermark,
- 9 → Kärnten.

Example

Validate 1010 (Vienna’s first district): four digits, leading 1 → Wien. Validate 8010 (Graz): leading 8 → Steiermark. Validate 6020 (Innsbruck): leading 6 → Tirol / Vorarlberg.

Notes

The Bundesland mapping is a heuristic based on the leading digit, so it returns the routing zone rather than the exact municipality and is approximate for towns near a state border. A valid four-digit format does not guarantee the specific code is assigned. Confirm against Österreichische Post’s official PLZ directory when delivery accuracy matters. Everything runs locally in your browser.