Reference Data Rate Center Directory MARMADUKE, AR Rate Center MARMADUKE — AR Data last updated: March 10, 2026 LATA 528 State AR Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 36.1878490077852, -90.38433089249226 Area Codes 870 Top Carriers Carrier OCN NXX Count BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 1
