The Postal Addressing Systems publication contains the addressing structures used by member countries, with examples of addresses for each country and useful contacts in countries to provide or check correct addressing.
The Universal Postal Union is a specialized agency of the United Nations. Its
International Bureau is in permanent contact with the designated operators of the UPU's 192 member countries.
The Addressing Solutions Unit develops and distributes addressing standards, as well as POST*CODE® products and services designed to ensure proper use of international addresses.