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  1. ZIP Code - Wikipedia

    The ZIP Code system (an acronym for Zone Improvement Plan[1]) is the system of postal codes used by the United States Postal Service (USPS). The term ZIP was chosen to suggest that …

  2. Free ZIP code map, zip code lookup, and zip code list

    The term ZIP stands for Zone Improvement Plan. The basic 5-digit format was first introduced in 1963 and later extended to add an additional 4 digits after a dash to form a ZIP+4 code. The …

  3. ZIP Code™ Lookup | USPS

    Enter a corporate or residential street address, city, and state to see a specific ZIP Code ™. Find by Address By City and State

  4. Saint Ann, Jamaica – Postal Codes/ZIP Codes

    Find the postal code or address for any location in Saint Ann, Jamaica with our interactive map of zip codes. Simply click on the desired location on the map. Each region in Saint Ann has its …

  5. ZIP Code Meaning & History: Everything You Need to Know

    Jun 11, 2025 · What is a ZIP Code? A ZIP Code is a smart system that keeps America’s mail moving efficiently. It was created by the United States Postal Service (USPS) in 1963. ZIP …

  6. ZIP Code | Postal Addressing, Delivery, Formatting | Britannica

    Oct 21, 2025 · ZIP Code, system of zone coding (postal coding) introduced by the U.S. Post Office Department (now the U.S. Postal Service) in 1963 to facilitate the sorting and delivery of …

  7. What Is a ZIP Code? Definition, ZIP+4, Lookup, and USPS Basics

    At its core, a ZIP code is a U.S. postal code that lets the United States Postal Service group addresses into logical clusters so machines and people can sort mail and deliver mail reliably. …

  8. What Is My ZIP Code? (Automatic GPS Detection) - Find My ZIP Code

    Your ZIP code is a 5-digit postal code used by the United States Postal Service (USPS) to identify the exact geographic region where you are located. It helps ensure mail and packages reach …

  9. What is Zip Code and How Do Zip Codes Work? - PostGrid

    As the name suggests, the US ZIP code list lists ZIP codes of all the addresses inside the United States. The USPS maintains the US ZIP codes list because it is the official postal authority of …

  10. What is a ZIP Code? Origins, Formats, and Applications.

    Jul 30, 2024 · In the US, ZIP Code stands for “Zone Improvement Plan Code,” a postal code system introduced by USPS to efficiently organize mail delivery by dividing regions into …