Reference Data Rate Center Directory NOCROOKSTN, SD Rate Center NOCROOKSTN — SD Data last updated: March 10, 2026 LATA 644 State SD Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 43.04826984952209, -100.7586367713068 Area Codes 605 Top Carriers Carrier OCN NXX Count GREAT PLAINS COMMUNICATIONS, INC. 1577 1
