General transport locations (cities, seaports, airports) may be required for specifying delivery terms or transport routes. For such general locations, which are not linked to a particular company, it is not appropriate to assign a GLN. Communication of these general locations may be based on non-GS1 standard code lists, such as the UN/LOCODE3.
Locations owned or managed by a specific company (ex. a port terminal) require GS1 ID Keys.