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- The first digit in a ZIP code represents a defined group of U.S. states. The second and third digits represent a region in that group, such as a large city. To send mail, only the first five digits of the ZIP code are required.
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How are zip codes numbered?
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What is a ZIP code & how does it work?
What is a ZIP code?
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. The main town in a region (if applicable) often gets the first ...
The first alphanumeric code (the outward code or outcode) has between two and four characters and the second (the inward code or incode) always has three characters. The outcode indicates the postcode area and postcode district.
Sep 17, 2020 · About 20 years after the first ZIP codes were put into place, the Postal Service made one more tweak to the system: the four digits that come after your ZIP code. These stand for a specific...
- Claire Nowak
The first three letters NW3 are the outward code. They are geographic and in this case, they tell you that it's in the northwestern part of London (NW). These outward codes are used to route mail to the right post office.
Mar 17, 2019 · ZIP Codes, five-digit numbers that represent small areas of the United States, were created by the United States Postal Service in 1963 to aid in the efficiency of delivering the ever-increasing volume of mail. The term "ZIP" is short for "Zone Improvement Plan." The First Mail Coding System.
- Matt Rosenberg
Understanding the Structure. A standard ZIP Code consists of five digits. But did you know that each digit serves a specific purpose? Here’s what they mean: The first digit represents the national area or region of the United States (see our chart below for a breakdown).
Feb 2, 2024 · For example, the first digit ranges from 0 to 9 and is for the general area. The number 0 is for the Northeast area, and 9 is for the West Coast, Hawaii and Alaska. The two numbers that follow are for the regional area and the last two numbers are for the post office or postal zone.
