Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
406-429 A RNDPMTXCDS0  2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 0   2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 1   2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 2   2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 4   2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 5   2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 6   2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 7   2246 MID-RIVERS TEL. COOP., INC. 650      
406-429 8   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2026-06-15   
406-429 9   2246 MID-RIVERS TEL. COOP., INC. 650      

Last updated: Sat, 02 May 2026 12:20:53 UTC

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