describes conventions for addressing postal mail from
within the USA to other countries that are both (a)
effective (i.e. have a good chance of working), and
(b) as inoffensive as possible when addressing choices
might be controversial.
links to domestic zip codes, U.S. zip codes, US post
offices, postal rates, verify an address, zip codes with
demographics, associate a zip code with area codes,
country, latitude, longitude, MSA, PMSa, congressional
district, FIPS code and time zone, and more.