{"input":"6057230209","is_valid_nanp":true,"e164":"+16057230209","formatted":"(605) 723-0209","country_code":"+1","area_code":"605","region":"South Dakota","principal_city":"Sioux Falls","timezone":"America/Chicago","current_local_time":"2026-08-14 21:44:56","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/605","source":"North American Numbering Plan Administrator via areacode.fyi","data_date":"2026-08-02"}