The UIC Country Code is a two digit-number identifying countries in which members of the International Union of Railways (UIC) are active. The UIC has issued numbering systems for rolling stock (UIC wagon numbers) and stations that include the country code. The values are defined in UIC leaflet 920-14. Railroads in North America use a system based on company-specific reporting marks, and a similar system, ISO 6346, is used for intermodal containers.