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: 961

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-961 A Hamilton MT CRVSMTMARS1  9636 QWEST CORPORATION 648      
406-961 0 Hamilton MT   9636 QWEST CORPORATION 648      
406-961 1 Hamilton MT   9636 QWEST CORPORATION 648      
406-961 2 Hamilton MT   145J TERRA NOVA TELECOM INC. 648   2025-12-08   
406-961 3 Hamilton MT   9636 QWEST CORPORATION 648      
406-961 4 Hamilton MT   9636 QWEST CORPORATION 648      
406-961 5 Hamilton MT   9636 QWEST CORPORATION 648      
406-961 6 Hamilton MT   9636 QWEST CORPORATION 648      
406-961 7 Hamilton MT   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2011-01-23   
406-961 8 Hamilton MT   9636 QWEST CORPORATION 648      
406-961 9 Hamilton MT   792K CHARTER IP ENABLED SERVICES, LLC 648   2008-11-21   

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

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