Reference Data Rate Center Directory STEFFENVL, MO Rate Center STEFFENVL — MO Data last updated: March 10, 2026 LATA 524 State MO Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 39.97057507672001, -91.88186521408102 Area Codes 660 Top Carriers Carrier OCN NXX Count MARK TWAIN RURAL TEL. CO. 1914 1
