Generate test fødselsnummer numbers
Fictional numbers with correct check digits, for testing software. They may by chance match a real person's number, so never use them to identify or impersonate anyone.
Click a number to copy it.
How a fødselsnummer is structured
- DDMMYY: date of birth. In a D-number, 40 is added to the day.
- III: individual number, which together with the year determines the century; its last digit is odd for men.
- KK: two check digits (modulus 11).
How the check works
Using the published example 151086 95088:
First check digit: weights 3-7-6-1-8-9-4-5-2 on the first 9 digits give 223; 11 − (223 mod 11) = 8, so it is 8. Second: weights 5-4-3-2-7-6-5-4-3-2 on the first 10 digits give 201; 11 − (201 mod 11) = 8, so it is 8. If either result is 10, the number can't be issued.
A passing check only means the number is well-formed; it doesn't prove the number was issued to anyone.
Frequently asked questions
What is a D-nummer?
A number for people who need an ID in Norway without being registered as residents. It has 40 added to the day of birth.
Why is a number with a future birth date rejected?
Because nobody with that birth date can have been issued a number yet.