{"input":"5107212604","is_valid_nanp":true,"e164":"+15107212604","formatted":"(510) 721-2604","country_code":"+1","area_code":"510","region":"California","principal_city":"Oakland","timezone":"America/Los_Angeles","current_local_time":"2026-08-14 15:33:34","note":"An area code only shows where a number is registered, not who is calling. Caller ID can be spoofed, so the code alone is not proof a call is local, safe, or fraudulent.","area_code_url":"https://areacode.fyi/510","source":"North American Numbering Plan Administrator via areacode.fyi","data_date":"2026-08-02"}