NUTS 2021, v1
The Nomenclature of territorial units for statistics, abbreviated NUTS (from the French version Nomenclature des unités territoriales statistiques) is a geographical nomenclature subdividing the economic territory of the European Union (EU) into regions at three different levels - NUTS 1, 2 and 3 respectively, moving from larger to smaller territorial units.
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/nuts-eu?id=ff3c68c4-87de-4ae7-88ad-9e8f284ff27e