Postal codes in Denmark are determined by a four digit system that was introduced in 1967.[1] The only exceptions are five special purpose 3-digit codes.
The self-governing territory of Greenland is part of the Danish system (39xx).[2] Historically, the Faroe Islands also formed part of the Danish postal code system using the 38xx range and the prefix "FR", but this was changed to a new format consisting of a three-digit code and the country code "FO", with FR 3800 Tórshavn becoming FO-110 Tórshavn.[3]