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 …

What is a zip code/postal code? In the United States of America a zipcode is five or nine numbers that are added to a postal address to assist the sorting of mail. There are currently about …

The Zoning Improvement Plan (ZIP) Code was launched in 1963 to better process and deliver increasing volumes of U.S. Mail. The first number in the five-digit ZIP Code represents a …

United States Zip Codes provides a free zip code map and list of zip codes by state. Find zip codes by address, zip codes by city, or zip codes by state.

Find your ZIP code instantly using geolocation or search our comprehensive database of US ZIP codes by state and city.

Jun 11, 2025 · Discover the meaning, structure, and origin of ZIP Codes in this complete guide to postal history and mail sorting.

Feb 10, 2025 · A zip code refers to a type of postal code and is used primarily in the United States and the Philippines. The postal code, however, is typically utilized by the rest of the countries …

A Zip Code Lookup is a tool that allows you to find the ZIP code (comprising five numbers) and other postal information for a particular address, city, or company in the U.S. ZIP Codes itself …

Learn what a ZIP code is, how ZIP+4 works, and how USPS uses codes for faster delivery. Try ZIP code lookup and address verification.

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 …