The postal codes directory provides easy browsing by the first letter from the country name. This page shows all the countries starting with letter O. To navigate to the postal code you are looking for, click on the country in which it is located. The directory is structured in this way to provide easy navigation and fluent user experience. Our database lists all the countries which support the postal code system. In the United States postal codes are referred to as ZIP codes.
In case you know the exact name of the city you are looking for, please use our post code text search