For the curious, there is a lot more about National Numbers in this pdf: https://www.ibz.rrn.fgov.be/sites/default/files/documents/nl/rijksregister/bestand-rr/b

For the curious, there is a lot more about National Numbers in this pdf: https://www.ibz.rrn.fgov.be/sites/default/files/documents/nl/rijksregister/bestand-rr/bestand-RR.pdf https://www.ibz.rrn.fgov.be/sites/default/files/documents/nl...