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: BGTMMTXCDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-326 A Reedpoint MT 2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-537 A Melville MT 2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-663 A Rapelje MT 2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-667 A Broadview MT 2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-669 A Molt MT 2257 TRIANGLE TEL. COOP. ASSN., INC. 650      
406-932 A Big Timber MT 2257 TRIANGLE TEL. COOP. ASSN., INC. 650      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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