Country Codes

ISO Standard Country Codes

This table lists the ISO standard country codes:

Country, Region, and Territory Postal System Reliability

The postal addresses of the world vary in their reliability according to how well a regional postal system can maintain its postal address database. Delivery Address Verification (DAV) uses the databases maintained by these various postal systems to verify order address information. Countries, regions, and territories are grouped into five categories according to the reliability of their postal system databases.

Category I-A

These countries or regions have rigorous testing and a postal certification process that results in the largest amount and greatest accuracy of postal data.

This table lists the Category I-A countries, regions, and territories:

Category I-B

These countries or regions provide complete address data, including all street names and all valid address ranges for the buildings on the streets. Although the postal systems of these countries lack the rigor of the Category I-A postal systems, these countries generally provide reasonably accurate and almost complete postal information.

This table lists the Category I-B countries, regions, and territories:

Category II

These countries or regions have fairly reliable postal systems and provide street names, city names, and postal codes for large and small cities. These countries also provide incomplete ranges for the addresses of buildings. While you can often trust the validation results for the street name, city name, and postal code, the validation of building addresses cannot be trusted.

This table lists the Category II countries, regions, and territories:

Category III

The postal systems in these countries provide street names, city names, and postal codes for large cities only and incomplete or no information for smaller cities. These postal systems might also provide an extremely limited set of building address ranges. You can trust the validation results for city name, street name, and postal code for larger cities. For smaller cities, you can trust validation results for city name and postal code.

This table lists the Category III countries, regions, and territories:

Category IV

In these countries or regions, the postal systems are highly variable. Most countries or regions provide a list of cities and postal codes. Some cities and postal codes might not be present in the country's or region's postal database.

This table lists the Category IV countries, regions, and territories: