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: BZMNMTHZDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-530 3 Laurel MT 746D MONTANA OPTICOM, LLC - MT 650      
406-624 A Bozeman MT 746D MONTANA OPTICOM, LLC - MT 650      
406-624 0 Bozeman MT 746D MONTANA OPTICOM, LLC - MT 650      
406-694 0 Billings MT 746D MONTANA OPTICOM, LLC - MT 650      
406-823 1 Livingston MT 746D MONTANA OPTICOM, LLC - MT 650      
406-924 8 Belgrade MT 746D MONTANA OPTICOM, LLC - MT 650      
406-999 A Big Sky MT 746D MONTANA OPTICOM, LLC - MT 650      

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

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