How is an Austrian SVNR structured?

It is ten digits: a three-digit serial, then a check digit, then the date of birth as DDMMYY. The check digit is computed with weights over the other nine digits modulo 11.

Why is a check digit of 10 never used?

If the weighted formula produces 10, that serial is not issued and is re-allocated, so a valid SVNR never has a check digit of 10.

Is anything uploaded?

No. All decoding and validation happen locally in your browser.

Austria SVNR Validator

Decode an Austrian social-security number — date and check digit.

Austrian SVNR validator

The Austrian SVNR (Sozialversicherungsnummer) is a 10-digit social-security number: a three-digit serial, a check digit, and the date of birth as DDMMYY. The check digit is a weighted modulo-11 value computed over the other nine digits.

Paste a number and this tool decodes the serial and date of birth and confirms the check digit — all in your browser, with nothing uploaded.