Holyoke CO ZIP Code
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Holyoke city is located in Colorado State, Phillips County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Holyoke CO zip code by its streets and block numbers if we have some of the Holyoke streets loaded in our website
Holyoke Area Code is 970 and Time Zone is Mountain (GMT -07:00).
Holyoke Zip Code - Colorado
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Holyoke City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Holyoke ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Holyoke, Colorado.
The Holyoke Zip Code is 80734.
If you want to send a mail to Holyoke City, you should use the 80734 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Holyoke 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 80734 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Holyoke 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.