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: MSSLMTEH4MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-304 3 Missoula MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2016-12-15   
406-317 1 Missoula MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2012-05-06   
406-319 A Polson MT 792K CHARTER IP ENABLED SERVICES, LLC 648      
406-319 2 Polson MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2006-04-17   
406-330 A Clinton MT 792K CHARTER IP ENABLED SERVICES, LLC 648      
406-330 2 Clinton MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2006-06-03   
406-332 1 Pablo MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2024-03-31   
406-361 8 Hamilton MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2014-05-05   
406-375 5 Hamilton MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2006-05-17   
406-493 A Missoula MT 792K CHARTER IP ENABLED SERVICES, LLC 648      
406-493 0 Missoula MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2006-06-19   
406-493 1 Missoula MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2007-10-01   
406-493 6 Missoula MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2005-08-13   
406-540 4 Missoula MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2014-05-28   
406-625 2 Stevensville MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2005-10-21   
406-626 6 Frenchtown MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2024-10-14   
406-718 1 Darby MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2024-09-08   
406-830 A Missoula MT 792K CHARTER IP ENABLED SERVICES, LLC 648      
406-830 3 Missoula MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2007-04-08   
406-833 2 Ronan MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2024-03-31   
406-926 A Missoula MT 792K CHARTER IP ENABLED SERVICES, LLC 648      
406-926 1 Missoula MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2011-03-06   
406-926 2 Missoula MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2011-08-21   
406-926 3 Missoula MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2011-12-03   
406-926 6 Missoula MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2013-11-11   
406-961 9 Hamilton MT 792K CHARTER IP ENABLED SERVICES, LLC 648   2008-11-21   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.