UN/LOCODE is a geographic coding scheme developed and maintained by UNECE a unit of the United Nations. It assigns aproximatly 40000 code elements to locations names of portss, airports, rail and road terminals, postal exchange offices, border crossing points and other locations used in trade and transport in 234 countries.

UNLOCODEs typically have 5 characters. The first 2 are letters, and come from the ISO 3166-1 country codes. Normally 3 letters will follow, but if there are not enough combinations, also numbers can be used.

Example

DEBER for Berlin in Germany (DE)
NLAMS for Amsterdam in NL
USNYC for New York City in US

External links