Reference Data Rate Center Directory GILSON, IL Rate Center GILSON — IL Data last updated: March 10, 2026 LATA 977 State IL Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 40.86059787398055, -90.20125539138934 Area Codes 309 Top Carriers Carrier OCN NXX Count MID CENTURY TEL. COOP., INC. 1054 1
