Reference Data Rate Center Directory DARLINGTON, MO Rate Center DARLINGTON — MO Data last updated: March 10, 2026 LATA 524 State MO Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 40.19924891894374, -94.39672102559683 Area Codes 660 Top Carriers Carrier OCN NXX Count GRAND RIVER MUTUAL TEL CO 1888 1
