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:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-943 A Sidney MT BLNGMTWE2MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-943 0 Sidney MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-943 3 Sidney MT   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 650   2016-11-28   
406-943 4 Sidney MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650      
406-943 5 Sidney MT   771G TELEPORT COMMUNICATIONS AMERICA - MT - LLC 650   2015-02-25   
406-943 7 Sidney MT   7575 CENTURYLINK COMMUNICATIONS LLC 650   2016-08-12   

Last updated: Tue, 31 Dec 2019 02:37:20 UTC

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