Counties and municipalities, v2:2003
After the amalgamation of the Bornholm municipalities in 2003, Bornholm's Regional Municipality (code 400) held the same special status as Copenhagen and Frederiksberg.
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/amt-kom?id=4c4a2921-d116-4bce-9145-2f7ad9184c4d