Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
406-349 A ALTAMTXCRS1  2235 BLACKFOOT TEL. COOP., INC. 648      

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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