{"area_code":"301","type":"geographic","status":"active","country":"US","region":"Maryland","region_code":"MD","principal_city":"Washington","cities":["Washington","Frederick","Gaithersburg","Rockville","Bowie","Hagerstown","Aspen Hill","Chillum","Clinton","College Park","Cumberland","Fairland","Fort Washington","Germantown","Greenbelt","Landover","Montgomery Village","North Bethesda","North Potomac","Olney","Potomac","Saint Charles","Silver Spring","South Laurel","Suitland","Waldorf","White Oak"],"timezone":"America/New_York","timezone_label":"Eastern Time","current_local_time":"2026-08-04 16:01:20","ten_digit_dialing":true,"service_type":null,"overlay_codes":["240","227"],"nearby_codes":["227","240","202","771","571","703"],"summary":"Area code 301 covers Washington and nearby cities including Frederick, Gaithersburg, Rockville in Maryland, in the Eastern Time.","carrier_summary":{"nxx_prefixes":786,"blocks":4737,"wireless_pct":27,"top_carriers":[{"name":"VERIZON MARYLAND, INC.","blocks":1622},{"name":"OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC","blocks":451},{"name":"ONVOY, LLC - MD","blocks":263},{"name":"CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD","blocks":263},{"name":"BANDWIDTH.COM CLEC, LLC - MD","blocks":253},{"name":"NEW CINGULAR WIRELESS PCS, LLC - DC","blocks":237}],"per_number":"https://areacode.fyi/api/v1/carrier/{number}"},"canonical_url":"https://areacode.fyi/301","source":"North American Numbering Plan Administrator via areacode.fyi","data_date":"2026-08-02"}