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These last 4 digits represent specific delivery routes within delivery areas. This extra detail means an even more precise matching to a more granular level. It could represent a handful of houses on one side of a street, or even a single building that receives a high volume of mail.

Zip code refers to a type of postal code and is used primarily in the United States and the Philippines. The postal code, however, is typically utilized by the rest of the countries scattered throughout the world.

?the five-digit ZIP number is a structured code in which the first digit identifies one of ten large areas of the Nation, and the second digit indicates a State, a geographic portion of a heavily populated State, or two or more less populated States.

The ZIP code 00001 is one of more than 42,000 five-digit ZIP Codes in the United States. ZIP area 00001 is located in the Dillingham Census Area, state of Alaska.

ZIP Codes are numbered with the first digit representing a certain group of U.S. states, the second and third digits together representing a region in that group (or perhaps a large city) and the fourth and fifth digits representing a group of delivery addresses within that region.

As of 1963, zip codes' numbers are determined by a few factors: the area, the regional postal facility and the local zone.

Postcodes are unique to a specific country No, many countries use strings of numbers as their postal code. So if you just send us a query like 12345 we have no idea which country you mean.

The basic Zip code is 5 digits. However, over time, it has been enhanced. There is a Zip+4 (9 digits total) which can be used. There is also a longer carrier route zip code (which must be printed as a bar code).