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  2. ZIP Code - Wikipedia

    en.wikipedia.org/wiki/ZIP_Code

    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 individual high-volume receiver of mail, a post office box, or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery.

  3. This Is What Your ZIP Code Actually Means - AOL

    www.aol.com/zip-code-actually-means-235400396.html

    There are generally two widely accepted versions of a postal code: a ZIP code and a ZIP + 4 code. Established in 1963, ZIP codes are the most common and recognizable postal code used by the USPS ...

  4. List of postal codes - Wikipedia

    en.wikipedia.org/wiki/List_of_postal_codes

    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 ...

  5. Postal code - Wikipedia

    en.wikipedia.org/wiki/Postal_code

    There is an extended format of the ZIP Code known as the ZIP+4, which contains the basic five-digit ZIP Code, followed by a hyphen and four additional digits. These digits identify a specific delivery route, such as one side of a building, a group of apartments, or several floors of a large office building.

  6. List of U.S. state and territory abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._state_and...

    2-letter and 2-digit codes from the ... Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional ... and the ZIP code. [4] ...

  7. What Is a Billing Zip Code? How To Find Yours for Your ... - AOL

    www.aol.com/billing-zip-code-yours-credit...

    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.

  8. Postal address verification - Wikipedia

    en.wikipedia.org/wiki/Postal_address_verification

    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.

  9. POSTNET - Wikipedia

    en.wikipedia.org/wiki/POSTNET

    A 5 digit (plus check digit) barcode, containing the basic ZIP Code only, referred to as the "A" code. 32 bars total. A 6 digit (plus check digit) barcode, containing the last 2 digits of the ZIP Code and the 4 digits of the ZIP+4 Code, referred to as a "B" code. 37 bars total. In the early stages of Postal automated mail processing the B code ...