{"area_code":"605","type":"geographic","status":"active","country":"US","region":"South Dakota","region_code":"SD","principal_city":"Sioux Falls","cities":["Sioux Falls","Rapid City","Aberdeen","Pierre","Watertown"],"timezone":"America/Chicago","timezone_label":"Central & Mountain Time","current_local_time":"2026-08-04 15:03:35","ten_digit_dialing":true,"service_type":null,"overlay_codes":[],"nearby_codes":["701","712","308","402","531","320"],"summary":"Area code 605 covers Sioux Falls and nearby cities including Rapid City, Aberdeen, Pierre in South Dakota, in the Central & Mountain Time.","carrier_summary":{"nxx_prefixes":743,"blocks":3607,"wireless_pct":38,"top_carriers":[{"name":"CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD","blocks":705},{"name":"ONVOY, LLC - SD","blocks":517},{"name":"QWEST CORPORATION","blocks":411},{"name":"NEW CINGULAR WIRELESS PCS, LLC - IL","blocks":389},{"name":"BANDWIDTH.COM CLEC, LLC - SD","blocks":165},{"name":"AERIAL COMMUNICATIONS, INC.","blocks":154}],"per_number":"https://areacode.fyi/api/v1/carrier/{number}"},"canonical_url":"https://areacode.fyi/605","source":"North American Numbering Plan Administrator via areacode.fyi","data_date":"2026-08-02"}