Belgium Tax ID Numbers
National Number (NN)
For Individuals, Example: 63.11.28-001.74
The Belgian Numero National (NN) is 11 digits in the format NN.NN.NN-NNN.NN. It is issued to individuals and it encodes the date of birth.
For Entities, VAT, Example: 0403019261
The Belgian enterprise number (Ondernemingsnummer) is 10 digits in the format NNNNNNNNNN with an optional prefix of BE. Older 9-digit numbers should start with a leading zero. It is a unique identifier of companies within the Belgian administrative services. It was previously known as the VAT ID number.
Format Guide: N = Number; A = Letter; X = Number or Letter
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