Knowledge: ZIP Code™ - The Basics - faq.usps.com
Need to look up a ZIP Code™? Try the ZIP Code™ lookup tool on USPS.com. Note: The ZIP Code™ lookup tool will display the address in USPS standardized format. This may look …
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 …
Free ZIP code map, zip code lookup, and zip code list
US ZIP codes are a type of postal code used within the United States to help the United States Postal Service (USPS) route mail more efficiently. ZIP codes near me are shown on the map …
What Does “ZIP Code” Stand For? - Dictionary.com
Jun 8, 2020 · What is a ZIP+4? In the 1980s a new system was introduced called ZIP+4. Four additional digits (preceded by a hyphen) were added to the basic code. This allowed senders …
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. …
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 …
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 …
ZIP Codes in USA – Find a Code, Map, and Fun Facts
Jan 15, 2025 · ZIP Codes in the USA, often referred to as “Zone Improvement Plan” codes, were introduced in 1963 to simplify and expedite mail delivery. A ZIP Code is a five-digit number …
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 …
What is a ZIP Code? Origins, Formats, and Applications.
Jul 30, 2024 · What is a ZIP Code in the US? In the US, ZIP Code stands for “Zone Improvement Plan Code,” a postal code system introduced by USPS to efficiently organize mail delivery by …