Reference Data Rate Center Directory VERMONT, IL Rate Center VERMONT — IL Data last updated: March 10, 2026 LATA 977 State IL Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 40.29489770563009, -90.4268490312553 Area Codes 309 Top Carriers Carrier OCN NXX Count FRONTIER NORTH, INC. - IL 1015 1
