Carter MT ZIP Code
Carter city is located in Montana State, Chouteau County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Carter MT zip code by its streets and block numbers if we have some of the Carter streets loaded in our website
Carter Area Code is 406 and Time Zone is Mountain (GMT -07:00).
Carter Zip Code - Montana
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Carter City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Carter ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Carter, Montana.
The Carter Zip Code is 59420.
If you want to send a mail to Carter City, you should use the 59420 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Carter ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons". A ZIP+4 code uses the basic 59420 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Carter city block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in Montana.