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USPS ZIP Code Lookup
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A domestic ZIP Code number and other ZIP Code information (including ZIP+4 Codes) can be found through the ZIPCode Lookup tool on the search box above. Using the drop-down menu provided, you can search for a ZIP Code number by address, by city, by company, or you can find a city by ZIP Code. Simply fill in the appropriate fields (marked with a red asterisk) and then click the “Search” button. To find county information for an individual address, simply go to the ZIP Code lookup tool on usps-track.us and perform the following steps:
Type in an Address and City
Click “Search Button”
The complete address with ZIP Code will appear in the ZIP+4 lookup results
Underneath this information (directly below the city name), click on the “Mailing Industry Information” link
Specific county information for that address, as well as other pertinent mailing industry information, will display
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