# stdnum.at.vnr

VNR, SVNR, VSNR (Versicherungsnummer, Austrian social security number).

The Austian Versicherungsnummer is a personal identification number used for social security. The number is 10 digits long and consists of a 3 digit serial, a check digit and 6 digits that usually specify the person’s birth date.

More information:

- https://de.wikipedia.org/wiki/Sozialversicherungsnummer#Österreich

    >>> validate('1237 010180')
    '1237010180'
    >>> validate('2237 010180')
    Traceback (most recent call last):
        ...
    InvalidChecksum: ...

`stdnum.at.vnr.``calc_check_digit`(number)

  Calculate the check digit. The fourth digit in the number is ignored.

`stdnum.at.vnr.``compact`(number)

  Convert the number to the minimal representation. This strips the number of any valid separators and removes surrounding whitespace.

`stdnum.at.vnr.``is_valid`(number)

  Check if the number is a valid VAT number.

`stdnum.at.vnr.``validate`(number)

  Check if the number is a valid VAT number. This checks the length, formatting and check digit.