National identification numbering in Iceland

National identification numbering in Iceland was established in 1953 when the birth number system was implemented.

The third and present system is the identification number which replaced both previous systems, introduced in 1987.

The birth number (Icelandic: fæðingarnúmer) was the first national identification number in Iceland.

It was based on the individual's name and thus allowed alphabetical ordering since computers at the time could not work with the alphabet directly.

The identification number (Icelandic: kennitala) is the third and current national identification number in Iceland.