Links to USPS Lookups

These sites are maintained by the USPS and are included here for your convenience.

Find ZIP Code, ZIP+4 and Carrier Route for an Address

Using the "Search by Address”, type in your address and click the submit button. On the next page, you will see the ZIP Code and ZIP+4 for that specific address. If you would like to see the carrier route associated with that address, click the “Mailing Industry Information” link to the right of the address.

Find all of the ZIP Codes in a city

Find All Cities within a ZIP Code

USPS Web-based services

USPS Direct Mail Information

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More Information:

Carrier Route Maps
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Address Lists and Demographics
Carrier Route Data
ZIP Code Data
ZIP+4 Data

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