Reference Data Rate Center Directory STOCKHOLM, SD Rate Center STOCKHOLM — SD Data last updated: March 10, 2026 LATA 640 State SD Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 45.09950318773533, -96.80171355115961 Area Codes 605 Top Carriers Carrier OCN NXX Count INTERSTATE TELECOM COOP, INC. - SD 1651 1
