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
406-225 1 Boulder MT 624H ONVOY SPECTRUM, LLC 648      
406-289 6 Conrad MT 624H ONVOY SPECTRUM, LLC 648      
406-316 0 Boulder MT 624H ONVOY SPECTRUM, LLC 648      
406-316 2 Boulder MT 624H ONVOY SPECTRUM, LLC 648      
406-338 0 Browning MT 624H ONVOY SPECTRUM, LLC 648      
406-479 2 Butte MT 624H ONVOY SPECTRUM, LLC 648      
406-497 0 Butte MT 624H ONVOY SPECTRUM, LLC 648      
406-505 8 Conrad MT 624H ONVOY SPECTRUM, LLC 648      
406-505 9 Conrad MT 624H ONVOY SPECTRUM, LLC 648      
406-533 4 Butte MT 624H ONVOY SPECTRUM, LLC 648      
406-559 9 Anaconda MT 624H ONVOY SPECTRUM, LLC 648      
406-573 6 Browning MT 624H ONVOY SPECTRUM, LLC 648      
406-573 8 Browning MT 624H ONVOY SPECTRUM, LLC 648      
406-604 2 Great Falls MT 624H ONVOY SPECTRUM, LLC 648      
406-604 3 Great Falls MT 624H ONVOY SPECTRUM, LLC 648      
406-604 5 Great Falls MT 624H ONVOY SPECTRUM, LLC 648      
406-604 6 Great Falls MT 624H ONVOY SPECTRUM, LLC 648      
406-605 1 Butte MT 624H ONVOY SPECTRUM, LLC 648      
406-605 2 Butte MT 624H ONVOY SPECTRUM, LLC 648      
406-605 5 Butte MT 624H ONVOY SPECTRUM, LLC 648      
406-605 6 Butte MT 624H ONVOY SPECTRUM, LLC 648      
406-605 7 Butte MT 624H ONVOY SPECTRUM, LLC 648      
406-605 8 Butte MT 624H ONVOY SPECTRUM, LLC 648      
406-605 9 Butte MT 624H ONVOY SPECTRUM, LLC 648      
406-614 7 Bigfork MT 624H ONVOY SPECTRUM, LLC 648      
406-614 8 Bigfork MT 624H ONVOY SPECTRUM, LLC 648      
406-614 9 Bigfork MT 624H ONVOY SPECTRUM, LLC 648      
406-691 8 Anaconda MT 624H ONVOY SPECTRUM, LLC 648      
406-909 7 Columbia Falls MT 624H ONVOY SPECTRUM, LLC 648      
406-909 9 Columbia Falls MT 624H ONVOY SPECTRUM, LLC 648      
406-952 A Great Falls MT 624H ONVOY SPECTRUM, LLC 648      
406-952 2 Great Falls MT 624H ONVOY SPECTRUM, LLC 648      
406-952 5 Great Falls MT 624H ONVOY SPECTRUM, LLC 648      
406-952 6 Great Falls MT 624H ONVOY SPECTRUM, LLC 648      
406-952 7 Great Falls MT 624H ONVOY SPECTRUM, LLC 648      
406-952 8 Great Falls MT 624H ONVOY SPECTRUM, LLC 648      
406-952 9 Great Falls MT 624H ONVOY SPECTRUM, LLC 648      
406-964 2 Great Falls MT 624H ONVOY SPECTRUM, LLC 648      
406-964 3 Great Falls MT 624H ONVOY SPECTRUM, LLC 648      

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

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