A ZIP Code is an essential part of the mailing process. We provide your business with several different ways to find a ZIP Code and understand it.

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.

The first line is the recipient's name, the second line is the street address with a detailed house number, and the last line is the city, state abbr, and ZIP Code.

Enter a full mailing address to get the correct 9-digit ZIP+4 code and USPS-standardized address format. Free tool powered by official USPS data.

Our address validation software is able to retrieve the ZIP code of an address based on the Street name and number, City, and State information. If you don't have the ZIP code information for …

The last two digits identify the post office or delivery area within that region. In addition to the five-digit ZIP code, there are also ZIP+4 codes, which include an additional four digits that further …

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 the ZIP Codes for a city or town or the location of a given ZIP Code on our City/State/ZIP Code Associations page.

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

Each ZIP+4 code comprises a 9-digit code; the first 5 digits represent the standard ZIP code, and the last 4 digits identify a specific geographic location or group of addresses.