The "Authority code" relays on the ISO 3166-1/alpha-3 positions. If the ISO code doesn't exist, an alpha-numeric code is created. A traceability of this codes creation is ensured and historical relationships are also offered as from 1950 till now with the date(s) of event(s).
A country code comparison is provided between ISO codes, IANA codes (Internet ccTLDS – Country-code Top-level Domains), and TIR (Transport International par la Route) Vehicle system codes.
Codes marked in italic are obsolete and should not be used, excepted in the case of back-log work.
ISO 3166 is the International standard for country codes. The purpose of ISO 3166 is to establish codes for the representation of names of countries. This standard exists in three forms:
- ISO 3166-1 (2006) contains a two-letter code which is recommended as the general purpose code, a three-letter code which has better mnenomic properties and a numeric-3 code which can be useful if script independence of the codes is important.
- ISO 3166-2 (2007) gives codes for the names of the principal subdivisions (e.g provinces or states) of all countries coded in ISO 3166-1. This code is based on the two-letter code element from ISO 3166-1 followed by a separator and a further string of up to three alphanumeric characters.
- ISO 3166-3 (1999) contains a four-letter code for those country names which have been deleted from ISO 3166-1 since its first publication in 1974. The code elements for formerly used country names have a length of four alphabetical characters (alpha-4 code elements).
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