TS ISO 3166-3

TS ISO 3166-3 is a withdrawn standard that addresses the code system used to represent country names that have been removed from the ISO 3166 family. Its value lies in preserving a consistent way to identify historical country names that no longer appear in current country-code lists but still matter in records, archives, and data integration.

How the code for formerly used country names works

In the ISO 3166 framework, countries and their subdivisions are assigned codes for unambiguous reference. Countries can later change name, merge, split, or cease to be used under a former designation. ISO 3166-3 provides the principles for associating such former names with a dedicated code element. In general technical terms, this supports legacy records, historical statistics, cataloguing, legal references, and data mapping by linking outdated names to a controlled reference form.

What this standard covers

According to the supplied scope, the standard sets out the principles and maintenance arrangements for a code representing country names removed from ISO 3166 editions and from the consecutive edition of ISO 3166-1. It also contains lists of all formerly used country names removed since 1974, together with the code element assigned to each one. So the document serves both as a rule set and as a reference list for historical country-name coding.

This is not a modern country-code scheme for current political entities; it is a backward-looking identification system for names that have fallen out of use. That distinction is important wherever older geopolitical names must remain machine-readable and traceable across databases, archives, and standardised metadata.

• Mapping historical country names to a controlled code
• Providing references for names removed from ISO 3166
• Supporting archival, conversion, and metadata maintenance tasks
• Keeping legacy and current country references consistently linked