{"area_code":"773","type":"geographic","status":"active","country":"US","region":"Illinois","region_code":"IL","principal_city":"Chicago","cities":["Chicago","West Chicago"],"timezone":"America/Chicago","timezone_label":"Central Time","current_local_time":"2026-08-04 15:09:55","ten_digit_dialing":true,"service_type":null,"overlay_codes":["872"],"nearby_codes":["312","872","331","630","224","847"],"summary":"Area code 773 covers Chicago and nearby cities including West Chicago in Illinois, in the Central Time.","carrier_summary":{"nxx_prefixes":785,"blocks":5353,"wireless_pct":51,"top_carriers":[{"name":"T-MOBILE USA, INC.","blocks":1738},{"name":"ILLINOIS BELL TEL CO","blocks":792},{"name":"NEW CINGULAR WIRELESS PCS, LLC - IL","blocks":457},{"name":"CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL","blocks":354},{"name":"ONVOY, LLC","blocks":313},{"name":"BANDWIDTH.COM CLEC, LLC - IL","blocks":309}],"per_number":"https://areacode.fyi/api/v1/carrier/{number}"},"canonical_url":"https://areacode.fyi/773","source":"North American Numbering Plan Administrator via areacode.fyi","data_date":"2026-08-02"}