Castro Valley CA ZIP Code


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Castro Valley city is located in California State, Alameda County and has a unique zip code assigned by the US Postal Service Office.


You can search for the Castro Valley CA zip code by its streets and block numbers if we have some of the Castro Valley streets loaded in our website

Castro Valley Area Code is 510 and Time Zone is Pacific (GMT -08:00).



Castro Valley Zip Code - California

The US ZIP Code basic format consists of five decimal numerical digits assigned to the Castro Valley City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Castro Valley ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Castro Valley, California.

The Castro Valley Zip Code is 94546, 94552.



If you want to send a mail to Castro Valley City, you should use the 94546, 94552 Zip Code.

In 1983, the U.S. Postal Service introduced an expanded Castro Valley 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 94546, 94552 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Castro Valley 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.


Castro Valley, California - MAP



What is the Castro Valley Zip Code?

The Castro Valley Zip Code in California is 94546, 94552.


ZIP Plus 4 Castro Valley - US Streets Zip Codes

By pressing keys ctrol + F you can search Castro Valley zip codes by its streets, highways, and know the ZIP+4 US ZIP Code


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Search Castro Valley Zip Code

What is the zip code for Castro Valley CA?

94546, 94552

Castro Valley, California - US Zip Code



Castro Valley ZIP Code Lookup

94546, 94552 Zip Code File:
Zip Code: 94546, 94552,
City: Castro Valley
Castro Valley Area Code: 510
Castro Valley, CA - Time Zone: Pacific (GMT -08:00)
County: Alameda
City Alias: Castro Valley, Hayward, Castro Valley, Hayward
State: California
State Abb: CA



California Zip+4 - Nearby Castro Valley Cities

Cities near Castro Valley in California
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