Country Identifiers
GS1 — GS1 Prefix
ISO 3166 — Codes for the Representation of Names of Countries and Their Subdivisions
ISO 3166 is a standard published by the International Organization for Standardization (ISO) that defines codes for the names of countries, dependent territories, special areas of geographical interest, and their principal subdivisions (e.g., provinces or states). The official name of the standard is “Codes for the representation of names of countries and their subdivisions”.