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.

NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

NXX: 823

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-823 A Livingston MT LVTNMTMADS0  9636 QWEST CORPORATION 650      
406-823 0 Livingston MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2009-02-13   
406-823 1 Livingston MT BZMNMTHZDS0  746D MONTANA OPTICOM, LLC - MT 650   2010-08-16   
406-823 2 Livingston MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2020-01-05   
406-823 3 Livingston MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-823 4 Livingston MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2012-12-17   
406-823 5 Livingston MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2020-01-05   
406-823 6 Livingston MT LVTNMTMADS0  9636 QWEST CORPORATION 650      
406-823 7 Livingston MT   145J TERRA NOVA TELECOM INC. 650   2021-09-28   
406-823 8 Livingston MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2011-10-24   
406-823 9 Livingston MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2013-05-26   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.