AU
Australia
ISO 3166 Country Code
Oceania
Country Codes
Alpha-2 Code (ISO 3166-1 alpha-2)
AU
Alpha-3 Code (ISO 3166-1 alpha-3)
AUS
Numeric Code (ISO 3166-1 numeric)
036
Common Usage
HTML lang attribute
<html lang="au">
URL locale parameter
https://example.com/au/
JavaScript/TypeScript
const country = "AU"; const countryName = "Australia";
API Response (JSON)
{
"country": "AU",
"countryName": "Australia",
"alpha3": "AUS",
"numeric": "036"
}ISO 3166 Standard
ISO 3166 is the international standard for country codes. The alpha-2 code (AU) is the most commonly used format for domain names, language tags, and internationalization. The alpha-3 code (AUS) is used in shipping, banking, and official documents. The numeric code (036) is language-independent and useful for systems with character encoding limitations.