Reference Data Rate Center Directory DURHAM, MO Rate Center DURHAM — MO Data last updated: March 10, 2026 LATA 520 State MO Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 39.97418671722501, -91.66796895002699 Area Codes 573 Top Carriers Carrier OCN NXX Count MARK TWAIN RURAL TEL. CO. 1914 1
