---
id: "iso-3166-1"
kind: "glossary-term"
title: "ISO 3166-1"
language: "en"
category: "Governance and policy"
updated: "2026-10-04T14:01:23Z"
canonical: "https://tldlog.com/glossary/iso-3166-1/"
translations:
  es: "https://tldlog.com/es/glosario/norma-iso-3166-1/"
  de: "https://tldlog.com/de/glossar/iso-3166-1/"
  fr: "https://tldlog.com/fr/glossaire/norme-iso-3166-1/"
  it: "https://tldlog.com/it/glossario/iso-3166-1/"
  pt-BR: "https://tldlog.com/pt/glossario/norma-iso-3166-1/"
  ru: "https://tldlog.com/ru/glossariy/iso-3166-1/"
  zh-Hans: "https://tldlog.com/zh/cihui/iso-3166-1/"
---

# ISO 3166-1

The international standard that lists codes for countries and territories. Its two-letter codes are the basis for country code domains: IANA does not decide what counts as a country, it follows this list. A change in the list can lead to a new ccTLD or a retirement.

## related terms

- [ccTLD](https://tldlog.com/glossary/cctld/)
- [IANA](https://tldlog.com/glossary/iana/)
- [RFC 1591](https://tldlog.com/glossary/rfc-1591/)
- [ccTLD retirement](https://tldlog.com/glossary/cctld-retirement/)
- [ccTLD delegation and transfer](https://tldlog.com/glossary/cctld-delegation-and-transfer/)