What do the digits of a PINFL mean?

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Fourteen digits in five groups: sex and century, date of birth, place, sequence, check digit. Sex and century of birth — one digit, 1 to 6; 5 and 6 mark a man and a woman born from 2000 onward. Date of birth — six digits, day, month and year. District or city code — three digits; for a foreigner it records where the application was made, not where they live. Sequence number — three digits, the order in which documents were issued that day in that district. Check digit — computed modulo 10 over a repeating 731 weighting, so a mistyped number fails arithmetically. A PINFL is fourteen digits and every one of them carries meaning. The regulation composes it in five groups: an index of sex and century of birth, the date of birth as six digits, the code of the district or city, the person’s sequence number among those born that day there, and a check digit. Nothing in it is random, which is why a transposed digit is usually caught the moment it is entered. One group behaves differently for a foreigner. The third group ordinarily encodes a district of Uzbekistan, but where the applicant is a foreign citizen — resident, abroad, or acting through an authorised representative — it is chosen by the place the application was made, including the Uzbek diplomatic mission that took it. Two founders of the same company can therefore carry visibly different codes, and neither is wrong.

What do the digits of a PINFL mean?

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