{"area_code":"520","type":"geographic","status":"active","country":"US","region":"Arizona","region_code":"AZ","principal_city":"Tucson","cities":["Tucson","Casa Grande","Sierra Vista","Oro Valley","Catalina Foothills","Drexel Heights","Nogales"],"timezone":"America/Phoenix","timezone_label":"Mountain Time (Arizona, no DST)","current_local_time":"2026-08-04 14:06:35","ten_digit_dialing":true,"service_type":null,"overlay_codes":[],"nearby_codes":["480","602","623","928","915","505"],"summary":"Area code 520 covers Tucson and nearby cities including Casa Grande, Sierra Vista, Oro Valley in Arizona, in the Mountain Time (Arizona, no DST).","carrier_summary":{"nxx_prefixes":695,"blocks":5350,"wireless_pct":45,"top_carriers":[{"name":"T-MOBILE USA, INC.","blocks":837},{"name":"CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ","blocks":832},{"name":"QWEST CORPORATION","blocks":679},{"name":"ONVOY, LLC - AZ","blocks":671},{"name":"NEW CINGULAR WIRELESS PCS, LLC","blocks":501},{"name":"BANDWIDTH.COM CLEC, LLC - AZ","blocks":289}],"per_number":"https://areacode.fyi/api/v1/carrier/{number}"},"canonical_url":"https://areacode.fyi/520","source":"North American Numbering Plan Administrator via areacode.fyi","data_date":"2026-08-02"}