{"area_code":"307","type":"geographic","status":"active","country":"US","region":"Wyoming","region_code":"WY","principal_city":"Cheyenne","cities":["Cheyenne","Casper","Gillette","Laramie"],"timezone":"America/Denver","timezone_label":"Mountain Time","current_local_time":"2026-08-04 14:01:02","ten_digit_dialing":false,"service_type":null,"overlay_codes":[],"nearby_codes":["748","970","303","720","983","719"],"summary":"Area code 307 covers Cheyenne and nearby cities including Casper, Gillette, Laramie in Wyoming, in the Mountain Time.","carrier_summary":{"nxx_prefixes":497,"blocks":2781,"wireless_pct":35,"top_carriers":[{"name":"ONVOY, LLC - WY","blocks":610},{"name":"CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY","blocks":361},{"name":"NEW CINGULAR WIRELESS PCS, LLC","blocks":306},{"name":"QWEST CORPORATION","blocks":257},{"name":"BANDWIDTH.COM CLEC, LLC - WY","blocks":176},{"name":"T-MOBILE USA, INC.","blocks":170}],"per_number":"https://areacode.fyi/api/v1/carrier/{number}"},"canonical_url":"https://areacode.fyi/307","source":"North American Numbering Plan Administrator via areacode.fyi","data_date":"2026-08-02"}