Zip codes Alaska Skagway Hoonah Angoon

The post service of the USA has started to use ZIP codes in big cities in 1943 when the postal address began to be written in such way: Mr. Paul Jones 3256 Epiphenomenal Avenue Minneapolis 16, Minnesota Number 16 thus designated number of post district in city boundaries.In 1967 the system of ZIP codes became obligatory in all territory of the USA.In modern conditions, with introduction of the highly technological equipment for mail sorting, it is enough to use a five-digit ZIP code.Many gasoline pumps that offer "pay at the pump" require credit card customers to enter the ZIP code of their billing address as a form of added security.