Reference Data Rate Center Directory CASTLE, OK Rate Center CASTLE — OK Data last updated: March 10, 2026 LATA 538 State OK Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 35.47472189865641, -96.38343556357307 Area Codes 918 Top Carriers Carrier OCN NXX Count CENTRAL OKLAHOMA TELEPHONE CO., L.L.C. 1977 1
