Reference Data Rate Center Directory WELCH, OK Rate Center WELCH — OK Data last updated: March 10, 2026 LATA 538 State OK Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 36.87444804781352, -95.09509779181042 Area Codes 918 Top Carriers Carrier OCN NXX Count ATLAS TEL. CO. 1966 1
