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In 1983, the U.S. Postal Service introduced an expanded ZIP Code system that it named ZIP+4, often known as "plus-four codes", "add-on codes", or "add-ons". A ZIP+4 Code uses the basic five-digit code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a city block, a group of apartments, an ...
The first digit is assigned regionally (for example, ZIP codes beginning with 9 are found in the western coastal states, Alaska, Hawaii, and islands in the Pacific), and ZIP codes with the same first three digits are served by the same USPS sorting facility (which sometimes serve multiple such groupings), so will be geographically clustered ...
Autauga County Alabama: 01003 Baldwin County: 01005 Barbour County: 01007 Bibb County: 01009 Blount County: 01011 Bullock County: 01013 Butler County: 01015 Calhoun County: 01017 Chambers County: 01019 Cherokee County: 01021 Chilton County: 01023 Choctaw County: 01025 Clarke County: 01027 Clay County: 01029 Cleburne County: 01031 Coffee County ...
The five-digit codes of FIPS 6-4 used the two digit FIPS state code (FIPS Publication 5-2, also withdrawn on September 2, 2008), followed by the three digits of the county code within the state or possession. County FIPS codes in the United States are usually (with a few exceptions) in the same sequence as alphabetized county names within a state.
Your billing zip code, or credit card postal code, is the five-digit number on the bottom right, which in this sample is 90210. This would be the zip code associated with your billing address.
If the address is valid, it is assigned a ZIP+4 code something like this: 12344-5678, where the first five digits are the ZIP code and the trailing four digits are the delivery range. An address with a ZIP+4 code (or nine-digit ZIP code) is considered to be valid. In most cases, this means that the address is deliverable.
In a database, storing the ZIP+4 code in a 10 character field (with the hyphen) allows easy output in the address block, and storing the check digit in a 3-digit field (instead of calculating it) allows automatic checking of the validity of the ZIP+4 and delivery point fields in case one had been changed independently.
A 9 digit (plus check digit) barcode, containing the ZIP Code and ZIP+4 Code, referred to as the "C" code. 52 bars total. The 9-digit barcode enabled the sorting of mail to the individual delivery carrier, and in some cases into a semblance of delivery sequence. An 11 digit (plus check digit) barcode, containing the ZIP Code, ZIP+4 Code, and ...