Keswick IA ZIP Code
Keswick city is located in Iowa State, Keokuk County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Keswick IA zip code by its streets and block numbers if we have some of the Keswick streets loaded in our website
Keswick Area Code is 319 and Time Zone is Central (GMT -06:00).
Keswick Zip Code - Iowa
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Keswick City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Keswick ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Keswick, Iowa.
The Keswick Zip Code is 50136.
If you want to send a mail to Keswick City, you should use the 50136 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Keswick 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 50136 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Keswick 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.