1 definition by Wheememeowah

Top Definition
510
Area code for the inner East Bay.
Pronounced - "Five-one-oh"

Includes cites of Oakland, Union City, Fremont, Richmond, Berkeley, Hayward, and Newark, as well as various smaller suburbs.
No, Milpitas isn't part of the 510. It's 408, the South Bay.
by Wheememeowah March 22, 2007

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