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-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-214 3 Missoula MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2007-03-28   
406-221 3 Butte MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2007-05-16   
406-229 2 Cut Bank MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2017-08-15   
406-287 0 Whitehall MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2017-08-07   
406-303 3 Missoula MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2015-02-20   
406-309 3 Kalispell MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2019-02-14   
406-361 6 Hamilton MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2014-01-15   
406-389 3 Helena MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2016-02-26   
406-415 4 Deer Lodge MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2015-03-15   
406-437 A Helena MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648      
406-437 9 Helena MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2004-09-19   
406-521 3 Townsend MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2017-08-07   
406-576 1 Conrad MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2017-08-15   
406-708 3 Lewistown MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2016-09-27   
406-770 4 Great Falls MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2016-08-16   
406-865 3 Dillon MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2010-10-01   
406-879 3 Havre MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2010-01-28   
406-909 3 Columbia Falls MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2019-01-28   
406-952 3 Great Falls MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2006-11-30   
406-966 3 Shelby MT 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2014-03-14   

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

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