ES
Spain
ISO 3166 Country Code
Europe
Country Codes
Alpha-2 Code (ISO 3166-1 alpha-2)
ES
Alpha-3 Code (ISO 3166-1 alpha-3)
ESP
Numeric Code (ISO 3166-1 numeric)
724
Common Usage
HTML lang attribute
<html lang="es">
URL locale parameter
https://example.com/es/
JavaScript/TypeScript
const country = "ES"; const countryName = "Spain";
API Response (JSON)
{
"country": "ES",
"countryName": "Spain",
"alpha3": "ESP",
"numeric": "724"
}ISO 3166 Standard
ISO 3166 is the international standard for country codes. The alpha-2 code (ES) is the most commonly used format for domain names, language tags, and internationalization. The alpha-3 code (ESP) is used in shipping, banking, and official documents. The numeric code (724) is language-independent and useful for systems with character encoding limitations.