Reference Data Rate Center Directory DEVON, MT Rate Center DEVON — MT Data last updated: March 10, 2026 LATA 648 State MT Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 48.46716856681618, -111.4780119443426 Area Codes 406 Top Carriers Carrier OCN NXX Count NORTHERN TEL. COOP., INC. 2248 1
