Reference Data Rate Center Directory MARIETTA, IL Rate Center MARIETTA — IL Data last updated: March 10, 2026 LATA 368 State IL Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 40.50147261949881, -90.39292168292043 Area Codes 309 Top Carriers Carrier OCN NXX Count MID CENTURY TEL. COOP., INC. 1054 1
