Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Fort Yates, ND

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
701-455 A BSMRNDHQLMD  374F STANDING ROCK TELECOMMUNICATIONS, INC. 638      
701-613 A   8054 LEVEL 3 COMMUNICATIONS, LLC - ND 638   2026-04-13   
701-613 4   8054 LEVEL 3 COMMUNICATIONS, LLC - ND 638   2026-04-13   
701-827 A HAZNNDXADS1  4413 WEST RIVER TELECOMMUNICATIONS COOP. - ND 638      
701-854 A HAZNNDXADS1  4413 WEST RIVER TELECOMMUNICATIONS COOP. - ND 638      

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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