Reference Data Rate Center Directory WESTBY, MT Rate Center WESTBY — MT Data last updated: March 10, 2026 LATA 650 State MT Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 48.86982501447186, -104.0518627777559 Area Codes 406 Top Carriers Carrier OCN NXX Count NEMONT TEL COOP INC 2247 1
