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 the mail travels …

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

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 additional 4 …

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. A standard five …

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 stands for Zone …

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 the United States.

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 mail.

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 numerical codes.

Jun 21, 2025 · ZIP codes are structured to provide a systematic way of identifying geographic locations for efficient mail delivery. The standard ZIP code consists of five digits, while an extended version, …

A ZIP Code is a unique five-digit numeric code designed to streamline the distribution of mail by the United States Postal Service (USPS). ZIP is an acronym for Zone Improvement Plan, and contrary to …