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.

OCN: 746D MONTANA OPTICOM, LLC - MT

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
406-530 3 Laurel MT   650   2010-08-16   
406-624 A Bozeman MT BZMNMTHZDS0  650      
406-624 0 Bozeman MT   650   2004-05-03   
406-694 0 Billings MT   650   2010-08-16   
406-823 1 Livingston MT   650   2010-08-16   
406-924 8 Belgrade MT   650   2010-08-16   
406-999 A Big Sky MT BZMNMTHZDS0  650   2006-09-07   

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

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