Duncan OK ZIP Code
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Duncan city is located in Oklahoma State, Stephens County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Duncan OK zip code by its streets and block numbers if we have some of the Duncan streets loaded in our website
Duncan Area Code is 580 and Time Zone is Central (GMT -06:00).
Duncan Zip Code - Oklahoma
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Duncan City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Duncan ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Duncan, Oklahoma.
The Duncan Zip Code is 73533, 73534, 73536.
If you want to send a mail to Duncan City, you should use the 73533, 73534, 73536 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Duncan 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 73533, 73534, 73536 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Duncan 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 Oklahoma.