Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Glendive, MT

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
406-987 4 BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-09-15   
406-987 5 BLNGMTAS9MD  453F ONVOY, LLC - MT 650   2019-09-15   
406-987 6 BLNGMTWE8MD  508J CENTURYLINK COMMUNICATIONS, LLC 650   2016-08-11   
406-987 7   994E BANDWIDTH.COM CLEC, LLC - MT 650   2026-03-15   
406-987 8 BLNGMTWEDMD  624H ONVOY SPECTRUM, LLC 650   2025-01-16   
406-987 9 BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      

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Last updated: Sat, 04 Jul 2026 13:07:56 UTC

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