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: 812

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-812 A Laurel MT BLNGMTAS9MD  453F ONVOY, LLC - MT 650      
406-812 0 Laurel MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2012-02-06   
406-812 1 Laurel MT   792K CHARTER IP ENABLED SERVICES, LLC 650   2019-04-21   
406-812 2 Laurel MT   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2014-03-10   
406-812 3 Laurel MT   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2012-02-01   
406-812 4 Laurel MT   453F ONVOY, LLC - MT 650   2019-09-15   
406-812 5 Laurel MT   453F ONVOY, LLC - MT 650   2019-10-28   
406-812 6 Laurel MT   321J HD CARRIER LLC 650   2020-09-27   
406-812 7 Laurel MT   453F ONVOY, LLC - MT 650   2011-11-28   
406-812 8 Laurel MT   453F ONVOY, LLC - MT 650   2020-01-05   
406-812 9 Laurel MT   321J HD CARRIER LLC 650   2020-11-01   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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