Country Codes Reference

Look up ISO 3166 country codes - alpha-2 (two-letter), alpha-3 (three-letter), and numeric codes for 53 countries. Includes capitals, continents, and international phone dialing prefixes. Search by name, code, or region. Click any code to copy.

FAQ

ISO 3166 is the international standard for country codes. Alpha-2 (e.g., US) is used for top-level domains and locale tags. Alpha-3 (e.g., USA) is used in machine-readable documents. Numeric codes (e.g., 840) are language-independent.

Yes, click any alpha-2, alpha-3, or numeric code to copy it to your clipboard instantly. The code briefly highlights green to confirm the copy.

Geopolitical changes, disputed territories, and special administrative regions create edge cases. For example, Taiwan is TW/TWN/158. The United Kingdom is GB/GBR/826. Some dependencies and territories (like Puerto Rico, PR/PRI/630) have their own codes distinct from their sovereign state.

For locale detection and content localization, HTML lang attribute (lang='en-US'), hreflang tags for multilingual SEO, currency formatting, address forms, phone number validation, and geo-targeting in analytics and advertising platforms.

Search by country name, any ISO code, capital city, continent, or phone prefix. Results filter instantly as you type. The table shows all matching countries sorted alphabetically.

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