{"input":"3313344033","is_valid_nanp":true,"e164":"+13313344033","formatted":"(331) 334-4033","country_code":"+1","area_code":"331","region":"Illinois","principal_city":"Aurora","timezone":"America/Chicago","current_local_time":"2026-08-14 10:42:58","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/331","source":"North American Numbering Plan Administrator via areacode.fyi","data_date":"2026-08-02"}