Reference Data Rate Center Directory ETHRIDGE, MT Rate Center ETHRIDGE — MT Data last updated: March 10, 2026 LATA 648 State MT Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 48.55851446782799, -112.126167067349 Area Codes 406 Top Carriers Carrier OCN NXX Count NORTHERN TEL. COOP., INC. 2248 1
