Comment by T-A
1 day ago
> a national ID number isnt usually publicly available info
A couple of counterexamples:
Italy's "fiscal code" is generated with a simple algorithm which can be executed manually:
https://en.wikipedia.org/wiki/Italian_fiscal_code
Sweden's "personal identity number" is public information and can be looked up by anyone:
https://en.wikipedia.org/wiki/Personal_identity_number_(Swed...
Belgian National Number is your birth date, then an increment from 1 to 999 for every baby born that day, then a base-97 checksum.
Are there never more than 1k babies born in a day?
With a population of 12M and life expectancy of 80 years (give or take), probably not, as that needs ~400 newborns a day to maintain, and the birth rate is probably well below that, like in most Western countries.
Not sure if still the case: odd numbers for males and even numbers for females.
This also means a person’s Belgian RRN can change.
Yep, but they do not change on sex change, IIRC.
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