A side note: it is difficult to derive the federal state from an Austrian postal code systematically. For example, postcodes beginning with 5 are not automatically within Salzburg, but can also belong to Upper Austria. For the relatively small Burgenland, where most postcodes start with 7, some start with 2 (Lower Austria) or 8 (Styria). Lower Austria even tops this diversity...
- Austrian zip codes grouped by state (Bundesland): https://gist.github.com/Mobiletainment/147537645b0dc3e8497d755591527f28
- Mapping of Austrian zip codes and their state (Bundesland): https://gist.github.com/Mobiletainment/1cd3dd9e40dfcee2857cadd3b1165d83