Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
406-485 A WGLNMTXCDS2  2246 MID-RIVERS TEL. COOP., INC. 650      
406-485 1   2246 MID-RIVERS TEL. COOP., INC. 650      
406-485 2   2246 MID-RIVERS TEL. COOP., INC. 650      
406-485 3   2246 MID-RIVERS TEL. COOP., INC. 650      
406-485 5   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2018-12-17   
406-485 7   2246 MID-RIVERS TEL. COOP., INC. 650      
406-485 8   145J TERRA NOVA TELECOM INC. 650   2025-06-07   
406-485 9   2246 MID-RIVERS TEL. COOP., INC. 650      
406-974 A BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-974 0   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-974 2   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-974 3   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      
406-974 4   145J TERRA NOVA TELECOM INC. 650   2026-01-04   
406-974 6   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2019-10-10   
406-974 9   6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      

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

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