Austria PLZ validator
How the PLZ format works
- Format
- 4 digits
- Example
- 1010
Things to watch for
- Format-only check — does not confirm the PLZ actually exists
- Always exactly 4 digits with no separators
^[0-9]{4}$An Austrian Postleitzahl (PLZ) is the 4-digit postcode Austria’s Post uses to route mail, written with no separator — for example 1010 for Vienna’s first district. The system dates to 1966 and groups the country into ten broad postal zones (Leitzonen) by leading digit, so a PLZ’s first digit is a coarse hint at which part of the country it belongs to. Anyone validating an Austrian shipping address or a checkout form needs the PLZ to at least be the right length and shape before it’s trusted.
Because the PLZ is a plain 4-digit run with nothing to anchor against, a dropped or duplicated digit is easy to miss visually while still producing something that looks entirely plausible. Catching that at the point of entry is cheaper than a parcel misrouted to the wrong Leitzone.
How this validator works
This tool checks that the input is exactly 4 digits with no letters, spaces, or hyphens, entirely in your browser, with nothing sent to a server.
What a pass doesn’t tell you
A PLZ carries no check digit, so a correctly shaped 4-digit string is the most a client-side tool can confirm — not that Austria’s Post has assigned it to a real town, street, or delivery office. Confirming that requires Austria’s Post own PLZ lookup.
Scope: this page and tool cover format validation only — not address lookup, Leitzone matching, or confirming a PLZ is currently in use.
PLZ FAQ
What does PLZ stand for in Austria?
PLZ is short for Postleitzahl, the same term Germany uses, but Austria's Post assigns its own independent 4-digit system introduced in 1966 — an Austrian PLZ has no fixed relationship to a German one of the same digits.
Does the first digit of an Austrian PLZ mean anything?
Yes — Austria's Post groups the country into ten broad postal zones (Leitzonen) numbered 0 through 9, and the leading digit tells you which zone an address falls in. Vienna's districts cluster distinctively in the 1 range, covering everything from the first district outward.
Does a correctly formatted PLZ mean it actually exists?
No. This tool only confirms the string is exactly 4 digits — it doesn't check the PLZ against Austria's Post actual assignment list. Confirming a PLZ is real, and seeing which town or district it covers, requires Austria's Post own PLZ lookup.