Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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St Regis, MT

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
406-269 A MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-269 0 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-280 A MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-280 0 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-649 A ALTNMTXBRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-649 0 GRFLMTMAYMD  145J TERRA NOVA TELECOM INC. 648   2025-10-11   
406-649 1 BLNGMT939MD  145J TERRA NOVA TELECOM INC. 648   2026-07-05   
406-649 2 ALTNMTXBRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-649 7 ALTNMTXBRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-649 9 ALTNMTXBRS1  2235 BLACKFOOT TEL. COOP., INC. 648      

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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