Denison IA ZIP Code
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Denison city is located in Iowa State, Crawford County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Denison IA zip code by its streets and block numbers if we have some of the Denison streets loaded in our website
Denison Area Code is 712 and Time Zone is Central (GMT -06:00).
Denison Zip Code - Iowa
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Denison City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Denison ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Denison, Iowa.
The Denison Zip Code is 51442.
If you want to send a mail to Denison City, you should use the 51442 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Denison 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 51442 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Denison 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.