ZIP codes are numbered with the first number representing a certain group of U.S. states. The second and third numbers represent a region in that group of states or, in some cases, a large city. The fourth and fifth numbers representing a group of delivery addresses within that region.

Find the ZIP Code for an area of a city or town, or the location of a given ZIP Code. We make it simple. Enter an address and receive the ZIP+4 code. Here you will find ZIP Code frequently asked questions. Check online and get the answers quickly. Find publications and guides to assist you in managing your addresses.

Most people prefer using 5-digit ZIP codes, but it's better to add ZIP+4 codes to ensure accurate and timely mailing. You will also need to add the country name ‘USA’ on the last line since you're sending an international to the US. There could be some format variations in residential, PO Box, or military addresses.

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Jun 25, 2024 · The last 4 digits of a US ZIP Code, also known as a ZIP+4 code, represent more specific delivery routes within delivery areas. These additional digits provide even greater precision when matching addresses to specific locations.

Feb 12, 2024 · From the sorting process to final delivery, the meaning behind each digit in ZIP Codes (also known as “postal codes”) allows USPS and its letter carriers to determine exactly where a letter or package is traveling to.

Find ZIP+4 Codes for any USPS address. Lookup ZIP+4 Codes by single address, batch or API. Learn what they are and what they mean too. Use it free.

Mar 31, 2025 · 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 localities, neighborhoods, or USPS-serviced areas.

Aug 20, 2024 · ZIP Codes help sort and deliver mail. They have a special number structure. The first digit shows a group of U.S. states. The next two digits show a region or a big city in that group. The last two digits are for specific delivery addresses in that region. The first three digits often point to a sectional center facility.

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