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.

Our database of 45 million 9-digit ZIP+4 Codes is organized into separate websites for each of the 50 states and the District of Columbia. You can find more information such as ZIP Codes, …

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 …

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.

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 …

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.

Free ZIP Code Lookup and Finder. Lookup ZIP codes by city, address, state, county, or area code and get all the ZIP Codes.

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

This is what an address looks like with the ZIP +4 Code: The first five digits identify the area of the country and the delivery office to which the mail is directed.