Reference Data Rate Center Directory ANNAPOLIS, IL Rate Center ANNAPOLIS — IL Data last updated: March 10, 2026 LATA 978 State IL Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 39.14510882142604, -87.81672896830109 Area Codes 618 Top Carriers Carrier OCN NXX Count FRONTIER NORTH, INC. - IL 1036 1
