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Helena, MT

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
406-437 9 HLNAMTMAMMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 648   2004-09-19   
406-438 A HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648      
406-438 0 HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2022-12-10   
406-438 1 HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-10-22   
406-438 2 HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-10-22   
406-438 3 HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2009-11-23   
406-438 4 MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2023-04-01   
406-438 5 HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-07-14   
406-438 6 HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2010-10-11   
406-438 7 HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2011-02-06   
406-438 8 GRFLMTMAHMD  073H TELNYX LLC 648   2023-12-09   
406-438 9 GRFLMTMAHMD  073H TELNYX LLC 648   2023-12-09   
406-439 A MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 0 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 1 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 2 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 3 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 4 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 5 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 6 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 7 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 8 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-439 9 MSSLMTAG5MD  6010 NEW CINGULAR WIRELESS PCS, LLC 648      
406-440 A HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-440 0 HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-440 1 HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-440 2   6010 NEW CINGULAR WIRELESS PCS, LLC 648   2025-09-14   
406-440 3 HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-440 4 HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-440 5 HLNAMTMAWMD  6529 T-MOBILE USA, INC. 648   2024-02-22   
406-440 6 HLNAMTMAWMD  6529 T-MOBILE USA, INC. 648   2024-02-22   
406-440 7   520K TDS METROCOM, LLC 648   2025-11-17   
406-440 8 HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-440 9 HLNAMTHODS1  3924 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT 648      
406-441 A HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-442 A HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-443 A HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-444 A HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 A HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 1 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 2 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 3 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 4 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 5 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 6 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 7 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 8 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-447 9 HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-449 A HLNAMTMADS0  9636 QWEST CORPORATION 648      
406-457 A HLNAMTMADS0  9636 QWEST CORPORATION 648      

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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