Use our address lookup or code list to find the correct 5-digit or 9-digit (ZIP+4) code for your postal mails destination.

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 …

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 …

Nov 1, 2025 · ZIP Code: New Lenox, IL has only 1 Standard ZIP assigned to it by the U.S. Postal Service. County: The County, Parish, Borough, or Planning Region that ZIPs in New Lenox, IL …

The first number in the five-digit ZIP Code represents a general geographic area of the nation, “0” in the east, moving to “9” in the west. The next two numbers represent regional areas, and the …

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. …

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 …

Oct 23, 2025 · Zip codes, short for Zone Improvement Plan codes, are numerical postal codes used by the United States Postal Service (USPS) to streamline mail delivery. Essentially, they …

What is ZIP Code and what makes the Postal Code system so special? ZIP Codes are the postal code system used in the US. Read more.

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 …