: Located in Buchtel and Chauncey, Ohio (Athens County). 59716 : Located in Big Sky, Montana (Gallatin County). 85716 : Located in Tucson, Arizona (Pima County). USPS Internal Use

These extended house numbers are common in rural and unincorporated parts of Wisconsin to assist emergency services and utility providers in identifying properties along long county roads. ZIP Code Basics and Similar Codes

Occasionally, the United States Postal Service (USPS) uses unique identifiers for internal tracking or specific mail-sorting facilities that do not match a city or standard residential code. However, these are generally not valid for sending mail to a customer destination.

To verify a specific address or find a correct 5-digit code, you can use the official USPS ZIP Code Lookup tool .