"510" Artwork on Garbage Can. photo by himyThe 510 area code, which covers Oakland, most of Alameda County, and the western portion of Contra Costa County, was put into effect on September 2, 1991. (510) is the Legacy land line three digit telephone area code for the East Bay. From 1947 until September 2, 1991, Oakland was included in the 415 area code, which is now home only to San Francisco and Marin. On March 14, 1998, the 510 code was itself split along the top of the East Bay Hills, with everything on the east of the ridge line put into the newly created 925 area code -- which, you will notice, is the sum of 415 and 510.
...Doo-Dah-Dee... the call you have made requires a 20 cent deposit. Please hang up momentarily. Listen for dial tone. Deposit 20 cents. And dial your call again.
Cities in the 510 area code:
Alameda County
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Contra Costa County
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Usage and Variations
510
The Nickle-Dime.
The Five Ten.
The Five and Dime.
