Old Harbor AK ZIP Code
Old Harbor city is located in Alaska State, Kodiak Island County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Old Harbor AK zip code by its streets and block numbers if we have some of the Old Harbor streets loaded in our website
Old Harbor Area Code is 907 and Time Zone is Alaska (GMT -09:00).
Old Harbor Zip Code - Alaska
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Old Harbor City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Old Harbor ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Old Harbor, Alaska.
The Old Harbor Zip Code is 99643.
If you want to send a mail to Old Harbor City, you should use the 99643 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Old Harbor 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 99643 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Old Harbor 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 Alaska.