Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: BLNGMT30RS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-894 7 Billings MT 7830 MID-RIVERS TELEPHONE COOPERATIVE, INC. 650   2019-02-28   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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