Many postal administrations have postal code locators on their Web sites.
Please check the Universal Postal Union Web site link we have listed in our Other Postal Web Sites section. The Universal Postal Union provides a proposed list of standard country abbreviations on their Web site. Please note that the United States Postal Service does not permit the use of country abbreviations for addressing mail, since a universally recognized set of abbreviations has not been established for that purpose. Country codes may be used for your company's internal database purposes, but the full name of the country should be written in capital letters on the last line of the address. Yes, there is an international format that should be used when writing down foreign addresses.