Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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Casa, AR

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
501-233 A DAVLARXADS0  1734 ARKWEST COMMUNICATIONS, INC. 528      
501-866 A LTRKARZO6MD  516J TON80 COMMUNICATIONS, LLC 528      
501-866 2 LTRKARZO6MD  516J TON80 COMMUNICATIONS, LLC 528   2022-03-16   
501-866 6   145J TERRA NOVA TELECOM INC. 528   2025-05-13   

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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