CO
Colombia
ISO 3166 Country Code
South America
Country Codes
Alpha-2 Code (ISO 3166-1 alpha-2)
CO
Alpha-3 Code (ISO 3166-1 alpha-3)
COL
Numeric Code (ISO 3166-1 numeric)
170
Common Usage
HTML lang attribute
<html lang="co">
URL locale parameter
https://example.com/co/
JavaScript/TypeScript
const country = "CO"; const countryName = "Colombia";
API Response (JSON)
{
"country": "CO",
"countryName": "Colombia",
"alpha3": "COL",
"numeric": "170"
}ISO 3166 Standard
ISO 3166 is the international standard for country codes. The alpha-2 code (CO) is the most commonly used format for domain names, language tags, and internationalization. The alpha-3 code (COL) is used in shipping, banking, and official documents. The numeric code (170) is language-independent and useful for systems with character encoding limitations.