Reference Data Rate Center Directory SHERIDAN, MO Rate Center SHERIDAN — MO Data last updated: March 10, 2026 LATA 524 State MO Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 40.516262476068, -94.61539938544801 Area Codes 660 Top Carriers Carrier OCN NXX Count GRAND RIVER MUTUAL TEL CO 1888 1