The first part is the ISO 3166-1 code NL for the Netherlands, the second part is two-digit-alphabetic.
Encoding and decoding table
NL-DR Drenthe
NL-FL Flevoland
NL-FR Friesland
NL-GE Gelderland
NL-GR Groningen
NL-LI Limburg
NL-NB Noord Brabant
NL-NH Noord Holland
NL-OV Overijssel
NL-UT Utrecht
NL-ZE Zeeland
NL-ZH Zuid Holland
See also
This article is a stub. You can help Wikipedia by fixing it.