The United States Postal Service provides a ZIP code finder on its official website, USPS.com. The finder requires a street address, city and state to find a ZIP code.
The USPS ZIP code finder can also find which cities belong in a specific ZIP code. Alternatively, the website Whatismyzip.com automatically detects an Internet connection's location and provides the ZIP code for that location. Users must allow the website to access their location information. Users can also enter a specific address to find the ZIP code. Maps.Huge.info also provides a map with ZIP code boundaries. Visitors search the map by address or ZIP code.