{"area_code":"641","type":"geographic","status":"active","country":"US","region":"Iowa","region_code":"IA","principal_city":"Mason City","cities":["Mason City","Marshalltown","Ottumwa"],"timezone":"America/Chicago","timezone_label":"Central Time","current_local_time":"2026-08-04 15:01:03","ten_digit_dialing":false,"service_type":null,"overlay_codes":[],"nearby_codes":["515","319","563","507","924","712"],"summary":"Area code 641 covers Mason City and nearby cities including Marshalltown, Ottumwa in Iowa, in the Central Time.","carrier_summary":{"nxx_prefixes":584,"blocks":3765,"wireless_pct":35,"top_carriers":[{"name":"ONVOY, LLC - IA","blocks":641},{"name":"UNITED STATES CELLULAR - IA","blocks":459},{"name":"WINDSTREAM IOWA COMMUNICATIONS, INC.","blocks":311},{"name":"CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA","blocks":236},{"name":"T-MOBILE USA, INC.","blocks":191},{"name":"NEW CINGULAR WIRELESS PCS, LLC - IL","blocks":172}],"per_number":"https://areacode.fyi/api/v1/carrier/{number}"},"canonical_url":"https://areacode.fyi/641","source":"North American Numbering Plan Administrator via areacode.fyi","data_date":"2026-08-02"}