─────── § 04. NPA RECORD · 925 · FOLIO 0727 OF 0801 ──────────────
925
United States NPA Record
Area code 925 serves the inland portions of the East Bay counties of Alameda and Contra Costa in northern California.
Area code 925 serves the inland portions of the East Bay counties of Alameda and Contra Costa in northern California. It was created in 1998 by splitting from area code 510 along the Berkeley Hills.
IN SERVICEFirst record · 1998
§ 04.05Event Summary
mandatory dialing · 1split · 1
§ 04.06
Documentary Record · 2 events
CHRONOLOGICAL ORDER
1998-03-14
split
NPA 925 split from 510
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2021-10-24
mandatory dialing
Ten-digit dialing becomes mandatory in 925
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