Country Codes
ISO 2 / ISO 3 / numeric / calling code / TLD — full table of 246 countries.
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Version 2.3 · May 29, 2026
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What are country codes?
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A few different standards for naming the same place.
Several systems name countries: ISO 3166-1 alpha-2 (the two-letter codes like PT, US, JP), alpha-3 (PRT, USA, JPN), and numeric (620, 840, 392). Plus the E.164 international calling code and the country-code top-level domain (.pt, .us, .jp).
They're not always intuitive — ISO 2 for Switzerland is CH (from the Latin Confoederatio Helvetica), Germany is DE (Deutschland), and the United Kingdom's calling code is +44 not +1.