Belgian National Number (NN) Validator
Validate the authenticity, format, and checksum of Belgian National Number (NN).
About Belgian National Number (NN) Validation
The Belgian National Number (NN / Rijksregisternummer) is the unique 11-digit personal identifier assigned to all citizens and residents in Belgium.
Structured as: birthdate (YYMMDD), 3-digit daily counter (odd for males, even for females), and 2 check digits computed via Modulo 97 (prefixing 2 for post-2000 births).