Reference Data Rate Center Directory TISKILWA, IL Rate Center TISKILWA — IL Data last updated: March 10, 2026 LATA 368 State IL Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 41.29187342677498, -89.50604794542399 Area Codes 815 Top Carriers Carrier OCN NXX Count FRONTIER NORTH, INC. - IL 1015 1
