Reference Data Rate Center Directory GRIGGSVL, IL Rate Center GRIGGSVL — IL Data last updated: March 10, 2026 LATA 376 State IL Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 39.70941918209299, -90.721133719249 Area Codes 217 Top Carriers Carrier OCN NXX Count FRONTIER NORTH, INC. - IL 1015 1
