Diablo CA ZIP Code
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Diablo city is located in California State, Contra Costa County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Diablo CA zip code by its streets and block numbers if we have some of the Diablo streets loaded in our website
Diablo Area Code is 925 and Time Zone is Pacific (GMT -08:00).
Diablo Zip Code - California
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Diablo City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Diablo ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Diablo, California.
The Diablo Zip Code is 94528.
If you want to send a mail to Diablo City, you should use the 94528 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Diablo 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 94528 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Diablo 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 California.