{"area_code":"618","type":"geographic","status":"active","country":"US","region":"Illinois","region_code":"IL","principal_city":"Collinsville","cities":["Collinsville","Belleville","Carbondale","East Alton","East Saint Louis","Edwardsville","Granite City","O'Fallon"],"timezone":"America/Chicago","timezone_label":"Central Time","current_local_time":"2026-08-04 15:00:59","ten_digit_dialing":true,"service_type":null,"overlay_codes":["730"],"nearby_codes":["730","314","557","636","235","573"],"summary":"Area code 618 covers Collinsville and nearby cities including Belleville, Carbondale, East Alton in Illinois, in the Central Time.","carrier_summary":{"nxx_prefixes":786,"blocks":6052,"wireless_pct":36,"top_carriers":[{"name":"NEW CINGULAR WIRELESS PCS, LLC - IL","blocks":896},{"name":"ONVOY, LLC","blocks":895},{"name":"FRONTIER NORTH, INC. - IL","blocks":567},{"name":"T-MOBILE USA, INC.","blocks":529},{"name":"ILLINOIS BELL TEL CO","blocks":443},{"name":"CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL","blocks":436}],"per_number":"https://areacode.fyi/api/v1/carrier/{number}"},"canonical_url":"https://areacode.fyi/618","source":"North American Numbering Plan Administrator via areacode.fyi","data_date":"2026-08-02"}