Austria (at)

AT-specific Form helpers.

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Austrian Social Security numbers are composed of a 4 digits and 6 digits field.

The latter represents in most cases the person’s birthdate while the first 4 digits represent a 3-digits counter and a one-digit checksum.

The 6-digits field can also differ from the person’s birthdate if the 3-digits counter suffered an overflow.

This code is based on information available on


Validate the given value and return its “cleaned” value as an appropriate Python object. Raise ValidationError for any errors.


A Select widget that uses a list of AT states as its choices.


A form field that validates its input is an Austrian postcode.

Accepts 4 digits (first digit must be greater than 0). = (('BL', 'Burgenland'), ('KA', 'Carinthia'), ('NO', 'Lower Austria'), ('OO', 'Upper Austria'), ('SA', 'Salzburg'), ('ST', 'Styria'), ('TI', 'Tyrol'), ('VO', 'Vorarlberg'), ('WI', 'Vienna'))

A list of Austrian states according to