Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

NXX: 500

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-500 A Billings MT BLNGMT938MD  965H FRACTEL, LLC 650      
406-500 0 Billings MT BLNGMT938MD  965H FRACTEL, LLC 650   2019-03-30   
406-500 1 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2021-05-24   
406-500 2 Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-11-18   
406-500 3 Billings MT BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2019-08-23   
406-500 4 Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-10-28   
406-500 5 Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-10-28   
406-500 6 Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-11-18   
406-500 7 Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-11-18   
406-500 8 Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-11-18   
406-500 9 Billings MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-11-18   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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