Red Oak IA ZIP Code
Red Oak city is located in Iowa State, Montgomery County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Red Oak IA zip code by its streets and block numbers if we have some of the Red Oak streets loaded in our website
Red Oak Area Code is 712 and Time Zone is Central (GMT -06:00).
Red Oak Zip Code - Iowa
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Red Oak City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Red Oak ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Red Oak, Iowa.
The Red Oak Zip Code is 51566, 51591.
If you want to send a mail to Red Oak City, you should use the 51566, 51591 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Red Oak 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 51566, 51591 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Red Oak 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 Iowa.