The UN / LOCODE, full: United Nations Code of Trade and Transport Locations, is an international 5-letter code for places in countries around the world, which replaces the full city name. The list of codes is maintained by the United Nations Economic Commission for Europe (UNECE). The UN / LOCODE also contributes to the extension of the 3-letter IATA code that is too limited for many purposes. Construction
The UN / LOCODE is made up of a combination of the 2-letter ("alpha-2") country code according to ISO 3166 followed by a code based on the three-letter place name. If in a country the possible (17576) combinations with letters are used, numbers 2 through 9 are also used. Preferably a space is used between land and place, but it may be omitted. The UN / LOCODE does not have special characters and punctuation.
An example of this is NL AMS, the UN / LOCODE for the city of Amsterdam. Use
The UN / LOCODE is used for international document location placement transport because the UN / LOCODE is not bound to the local wording of the city name but internationally standardized.
The lists of place names and their codes have been published annually by the UNECE since 1981.
wiki
