Guides
Reference guides for ISO 3166-1 countries and their official subdivisions. This is the same dataset behind the CountriesDB API and widgets.
Why these guides exist
Developers often need a clear list of country codes and official region/state codes when wiring address forms, tax regions, or shipping rules. These guides surface that ISO 3166 reference data in a browseable format. Production apps should still call the CountriesDB API or embed the widget so names and codes stay current.
Start with the country index, open a country hub for alpha-2, alpha-3, and numeric codes, then review the country's official ISO 3166-2 subdivisions.
Frequently asked questions
- What are CountriesDB guides?
- Guides are public reference pages for ISO 3166-1 countries and their official ISO 3166-2 subdivisions. They use the same dataset behind CountriesDB widgets, the Data API, and validation.
- Are these pages meant for developers?
- Yes. Use them to look up alpha-2, alpha-3, and numeric codes plus official subdivision lists when building checkout forms, shipping zones, or backend validation.
- How do I use this data in production?
- Prefer the CountriesDB widget or authenticated Data API over scraping guide HTML. Guides are for SEO and human reference; integrations should use the API and validator packages.