Hannibal MO ZIP Code
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Hannibal city is located in Missouri State, Marion County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Hannibal MO zip code by its streets and block numbers if we have some of the Hannibal streets loaded in our website
Hannibal Area Code is 573 and Time Zone is Central (GMT -06:00).
Hannibal Zip Code - Missouri
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Hannibal City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Hannibal ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Hannibal, Missouri.
The Hannibal Zip Code is 63401.
If you want to send a mail to Hannibal City, you should use the 63401 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Hannibal 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 63401 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Hannibal 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.