Castle Rock CO ZIP Code
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Castle Rock city is located in Colorado State, Douglas County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Castle Rock CO zip code by its streets and block numbers if we have some of the Castle Rock streets loaded in our website
Castle Rock Area Code is 720/303 and Time Zone is Mountain (GMT -07:00).
Castle Rock Zip Code - Colorado
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Castle Rock City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Castle Rock ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Castle Rock, Colorado.
The Castle Rock Zip Code is 80104, 80108, 80109.
If you want to send a mail to Castle Rock City, you should use the 80104, 80108, 80109 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Castle Rock 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 80104, 80108, 80109 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Castle Rock 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 Colorado.