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: 428

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-428 A Grass Range MT GRRNMTXCRS1  2246 MID-RIVERS TEL. COOP., INC. 650      
406-428 2 Grass Range MT GRRNMTXCRS1  2246 MID-RIVERS TEL. COOP., INC. 650      
406-428 8 Grass Range MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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