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 different than the …

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 …

Jun 11, 2025 · Each ZIP Code is a five-digit number that organizes addresses into specific geographic areas and delivery routes, making it easier for USPS to sort and deliver mail quickly and correctly.

Each ZIP Code corresponds to a specific geographic area, aiding in sorting and direct mail from the point of origin to the destination more accurately and swiftly. A ZIP code™ consists of many …

Jun 21, 2025 · The 5-Digit ZIP Code: The standard ZIP code consists of five digits, which identify a specific geographic region. This system allows the USPS to efficiently route mail to the correct city or …

Nov 10, 2023 · Each ZIP code is a five-digit number, where each digit has its significance. The first digit denotes a group of U.S. states, and the second and third digits pinpoint a region within that …

ZIP codes are the handy postal code system used by the United States Postal Service (USPS) to sort and deliver mail efficiently. The name "ZIP" actually stands for "Zone Improvement Plan," which was …

In plain terms, it’s a five-digit identifier (with an optional ZIP+4 add-on) that helps the Postal Service sort mail, pick efficient routes, and get letters and parcels to the right delivery area on time.

Oct 21, 2025 · The U.S. Postal Service introduced a nine-digit ZIP Code in 1983. The new code, composed of the original five digits plus a hyphen and four additional numbers, was designed to …

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 different than the …