Keystone IA ZIP Code

Keystone city is located in Iowa State, Benton County and has a unique zip code assigned by the US Postal Service Office.

You can search for the Keystone IA zip code by its streets and block numbers if we have some of the Keystone streets loaded in our website

Keystone Area Code is 319 and Time Zone is Central (GMT -06:00).

Keystone Zip Code - Iowa

The US ZIP Code basic format consists of five decimal numerical digits assigned to the Keystone City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Keystone ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Keystone, Iowa.

The Keystone Zip Code is 52249.

If you want to send a mail to Keystone City, you should use the 52249 Zip Code.

In 1983, the U.S. Postal Service introduced an expanded Keystone 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 52249 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Keystone 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.

Keystone, Iowa - MAP

What is the Keystone Zip Code?

The Keystone Zip Code in Iowa is 52249.

ZIP Plus 4 Keystone - US Streets Zip Codes

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Keystone, Iowa - US Zip Code

Keystone ZIP Code Lookup

52249 Zip Code File:
Zip Code: 52249,
City: Keystone
Keystone Area Code: 319
Keystone, IA - Time Zone: Central (GMT -06:00)
County: Benton
City Alias: Keystone
State: Iowa
State Abb: IA

Iowa Zip+4 - Nearby Keystone Cities

Cities near Keystone in Iowa
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