San Geronimo CA ZIP Code
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San Geronimo city is located in California State, Marin County and has a unique zip code assigned by the US Postal Service Office.
You can search for the San Geronimo CA zip code by its streets and block numbers if we have some of the San Geronimo streets loaded in our website
San Geronimo Area Code is 415 and Time Zone is Pacific (GMT -08:00).
San Geronimo Zip Code - California
The US ZIP Code basic format consists of five decimal numerical digits assigned to the San Geronimo City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the San Geronimo ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in San Geronimo, California.
The San Geronimo Zip Code is 94963.
If you want to send a mail to San Geronimo City, you should use the 94963 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded San Geronimo 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 94963 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a San Geronimo 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.