Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: FRFDMTXCDS1

Remotes:

Switch Switch name Switch type
FTSHMTXARS1  FORT SHAW  RSS 
GYSRMTXCRS1  GEYSER  1RL 

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-733 A Highwood MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-734 A Carter MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-735 A Geyser MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-736 A Stockett MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-736 0 Stockett MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-736 1 Stockett MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-736 4 Stockett MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-736 5 Stockett MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-736 6 Stockett MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-736 7 Stockett MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-736 8 Stockett MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-736 9 Stockett MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-738 A Raynesford MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-753 A Brady MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-835 A Melrose MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-842 A Sheridan MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-842 1 Sheridan MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-842 2 Sheridan MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-842 3 Sheridan MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-842 4 Sheridan MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-842 5 Sheridan MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-842 6 Sheridan MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-842 7 Sheridan MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-842 8 Sheridan MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-842 9 Sheridan MT 2255 3 RIVERS TEL. COOP., INC. 648      
406-843 A Virginia City MT 2255 3 RIVERS TEL. COOP., INC. 648      

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Last updated: Sat, 02 May 2026 12:20:53 UTC

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