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.

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-897 0 Columbia Falls MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2021-11-18   
406-897 3 Columbia Falls MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2014-02-07   
406-897 4 Columbia Falls MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-09-30   
406-909 A Columbia Falls MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-909 0 Columbia Falls MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2018-07-08   
406-925 A Dillon MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-925 0 Dillon MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-925 1 Dillon MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-925 2 Dillon MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-925 3 Dillon MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-925 9 Dillon MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-955 A Kalispell MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2024-01-18   
406-955 1 Kalispell MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2024-08-22   
406-980 A Townsend MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-980 0 Townsend MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-980 1 Townsend MT 6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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