Reference Data Rate Center Directory ROCK SPG, MT Rate Center ROCK SPG — MT Data last updated: March 10, 2026 LATA 650 State MT Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 46.81899921212303, -106.2466146219544 Area Codes 406 Top Carriers Carrier OCN NXX Count MID-RIVERS TEL. COOP., INC. 2246 1
