The number of the Identification Card is formed by nine numeric marks.
The last mark of the numeric numbers is specifying. The specifying mark is formed based on ISO/IEC 7812-1 standard.
The numbers on the Identification Card begin with the numbers 00000001 (specifying mark) and end with the numbers 99999399 (specifying mark).
Identification Cards which include the numbers 99999400 (specifying mark) – 99999999 (specifying mark) are used as samples and are not valid.
Source: Iravaban.net