Country Code & Dial Code List

About this page

This page lists countries and territories with their official two- and three-letter codes (ISO 3166) and international telephone dial codes. You can search by name or code and filter by region.

What is a country code?

A country code is a short, standardized label for a country or territory. It is used so that systems and people in different languages can refer to the same place without ambiguity—in forms, databases, shipping, and telecommunications.

What is ISO? What is ISO 3166?

ISO (International Organization for Standardization) is a body that publishes international standards. ISO 3166 is the standard for country and region codes. It was first published in 1974 and is maintained so that codes stay consistent across borders and industries. The standard defines two-letter (alpha-2), three-letter (alpha-3), and numeric codes.

ISO2 and ISO3

ISO2 (or alpha-2) is the two-letter code, e.g. US, GB, JP. It is the most common in web forms and APIs. ISO3 (or alpha-3) is the three-letter code, e.g. USA, GBR, JPN. It is often used in statistics and when a more readable or unique code is needed. Both are part of ISO 3166-1.

Dial code

The dial code (or country calling code) is the number you dial before the local number when making an international call. It is defined by the ITU-T recommendation E.164. For example, +1 for USA and Canada, +44 for the UK, +81 for Japan. The plus sign (+) is the international prefix used in front of the code.

Region

The region groups countries by broad geographic area (e.g. Europe, Asia, Americas). It follows the UN M49 classification used in ISO 3166 and is useful for filtering and reporting. Some territories may have an empty region.