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: HRDNMTMARS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-665 A Hardin MT 9636 QWEST CORPORATION 650      
406-665 1 Hardin MT 9636 QWEST CORPORATION 650      
406-665 2 Hardin MT 9636 QWEST CORPORATION 650      
406-665 3 Hardin MT 9636 QWEST CORPORATION 650      
406-665 4 Hardin MT 9636 QWEST CORPORATION 650      
406-665 6 Hardin MT 9636 QWEST CORPORATION 650      
406-665 8 Hardin MT 9636 QWEST CORPORATION 650      
406-665 9 Hardin MT 9636 QWEST CORPORATION 650      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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