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: 484

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-484 A Crooked Creek MT BASNWYXCDS1  2296 TRI-COUNTY TEL. ASSN., INC. 654      
406-484 0 Crooked Creek MT BASNWYXCDS1  2296 TRI-COUNTY TEL. ASSN., INC. 654      
406-484 2 Crooked Creek MT BASNWYXCDS1  2296 TRI-COUNTY TEL. ASSN., INC. 654      
406-484 4 Crooked Creek MT   145J TERRA NOVA TELECOM INC. 654   2025-08-29   
406-484 6 Crooked Creek MT BASNWYXCDS1  2296 TRI-COUNTY TEL. ASSN., INC. 654      
406-484 9 Crooked Creek MT BASNWYXCDS1  2296 TRI-COUNTY TEL. ASSN., INC. 654      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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