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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NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

NXX: 724

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-724 A Glentana MT GLNTMTXCRS1  2247 NEMONT TEL COOP INC 650      
406-724 3 Glentana MT GLNTMTXCRS1  2247 NEMONT TEL COOP INC 650      
406-724 7 Glentana MT GLSGMTXC1MD  443B SAGEBRUSH CELLULAR, INC. 650      

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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