Reference Data Rate Center Directory NEWEFFNGTN, SD Rate Center NEWEFFNGTN — SD Data last updated: March 10, 2026 LATA 640 State SD Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 45.85695008973068, -96.91996662068182 Area Codes 605 Top Carriers Carrier OCN NXX Count RC TECHNOLOGIES 1674 1
