Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Billings MCA2, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
417-744 A BLNGMOMYRS0  9533 SOUTHWESTERN BELL 522      
417-744 1   9533 SOUTHWESTERN BELL 522      
417-744 2   9533 SOUTHWESTERN BELL 522      
417-744 4   9533 SOUTHWESTERN BELL 522      
417-744 5   093F ONVOY, LLC - MO 522   2019-11-30   
417-744 6   093F ONVOY, LLC - MO 522   2019-11-30   
417-744 7   145J TERRA NOVA TELECOM INC. 522   2025-07-14   
417-744 9   993E BANDWIDTH.COM CLEC, LLC - MO 522   2021-08-21   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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