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: BLNGMTWEDMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-606 3 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-606 5 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-606 7 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-608 2 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-608 3 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-608 4 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-608 5 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-608 6 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-717 1 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-717 2 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-717 3 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-867 0 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-867 3 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-867 7 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-867 9 Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-901 A Billings MT 624H ONVOY SPECTRUM, LLC 650      
406-901 9 Billings MT 624H ONVOY SPECTRUM, LLC 650      

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

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