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.
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OCN: 8140 RANGE TELEPHONE COOPERATIVE, INC. - MT

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
406-346 A Forsyth MT FRSYMTMA0MD  650      
406-346 1 Forsyth MT FRSYMTMA0MD  650      
406-346 2 Forsyth MT FRSYMTMA0MD  650      
406-346 3 Forsyth MT FRSYMTMA0MD  650      
406-346 4 Forsyth MT FRSYMTMA0MD  650      
406-346 5 Forsyth MT FRSYMTMA0MD  650      
406-346 6 Forsyth MT FRSYMTMA0MD  650      
406-346 7 Forsyth MT FRSYMTMA0MD  650      
406-346 8 Forsyth MT FRSYMTMA0MD  650      
406-346 9 Forsyth MT FRSYMTMA0MD  650      
406-749 5 Colstrip MT FRSYMTMA0MD  650   2023-12-12   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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