Callao MO ZIP Code
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Callao city is located in Missouri State, Macon County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Callao MO zip code by its streets and block numbers if we have some of the Callao streets loaded in our website
Callao Area Code is 660 and Time Zone is Central (GMT -06:00).
Callao Zip Code - Missouri
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Callao City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Callao ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Callao, Missouri.
The Callao Zip Code is 63534.
If you want to send a mail to Callao City, you should use the 63534 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Callao 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 63534 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Callao 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 Missouri.