Are ZIP Codes based on population or area?
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Are ZIP Codes based on population or area?
ZIP codes are five digits long. The first digit is assigned to a broad geographical area of the United States, ranging from zero in the Northeast to nine in the West. The next two digits pinpoint population concentrations and sectional centers accessible to common transportation networks.
What do the numbers in a ZIP code represent?
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.
How are ZIP Codes made?
The basic ZIP code is made up of five numbers. An extended ZIP + 4 code includes the five digits of the ZIP code, a hyphen and then four more digits. This lets a piece of mail to be sent to a more exact location than by the ZIP code alone.
Which city has the most zip codes?
The Most Populated Zip Codes in America
| Rank | ZIP code | Metro area |
|---|---|---|
| 1 | 77449 | Houston, Texas |
| 2 | 11368 | New York, New York |
| 3 | 60629 | Chicago, Illinois |
| 4 | 79936 | El Paso, TX, Texas |
What are the 4 extra digits of a ZIP code?
The 9-digit ZIP Code consists of two sections. The first five digits indicate the destination post office or delivery area. The last 4 digits represent specific delivery routes within delivery areas. ZIP plus 4 codes assist the USPS in effectively sorting and distributing mail.
What state has the least zip codes?
The lowest in-use zip code is 00501 and it belongs to the IRS mail processing center located in Holtsville, New York. Conversely, the highest in-use zip code, 99950, belongs to the city of Ketchikan, Alaska.
What is the smallest ZIP Code in the US?
00501
The lowest ZIP Code number is 00501, unique for the Internal Revenue Service in Holtsville, NY.