{"area_code":"730","type":"geographic","status":"active","country":"US","region":"Illinois","region_code":"IL","principal_city":"Centralia","cities":["Centralia","Belleville","Carbondale","Collinsville","East Alton","East Saint Louis","Edwardsville","Granite City","O'Fallon"],"timezone":"America/Chicago","timezone_label":"Central Time","current_local_time":"2026-08-04 15:10:53","ten_digit_dialing":true,"service_type":null,"overlay_codes":["618"],"nearby_codes":["618","314","557","636","235","573"],"summary":"Area code 730 covers Centralia and nearby cities including Belleville, Carbondale, Collinsville in Illinois, in the Central Time.","carrier_summary":{"nxx_prefixes":125,"blocks":939,"wireless_pct":63,"top_carriers":[{"name":"NEW CINGULAR WIRELESS PCS, LLC - IL","blocks":488},{"name":"TELEPORT COMMUNICATIONS AMERICA, LLC - IL","blocks":129},{"name":"ONVOY, LLC","blocks":99},{"name":"ONVOY SPECTRUM, LLC","blocks":48},{"name":"CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL","blocks":28},{"name":"COMMIO, LLC","blocks":24}],"per_number":"https://areacode.fyi/api/v1/carrier/{number}"},"canonical_url":"https://areacode.fyi/730","source":"North American Numbering Plan Administrator via areacode.fyi","data_date":"2026-08-02"}