Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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West Glacier, MT

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
406-888 A WGLCMTMARS1  9636 QWEST CORPORATION 648      
406-888 0   453F ONVOY, LLC - MT 648   2021-03-07   
406-888 1   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2023-04-24   
406-888 2   453F ONVOY, LLC - MT 648   2019-09-15   
406-888 3   073H TELNYX LLC 648   2020-08-13   
406-888 4   508J CENTURYLINK COMMUNICATIONS, LLC 648   2014-05-24   
406-888 5   9636 QWEST CORPORATION 648      
406-888 6   453F ONVOY, LLC - MT 648   2007-04-14   
406-888 7   9636 QWEST CORPORATION 648      
406-888 8   453F ONVOY, LLC - MT 648   2011-07-17   
406-888 9   9636 QWEST CORPORATION 648      

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

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