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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NPA: 458 [Rate centres in NPA 458] [Dial plan for NPA 458]

NXX: 321

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
458-321 A Phoenix OR EUGNOR53KMD  750E ONVOY, LLC - OR 670   2024-05-12   
458-321 0 Phoenix OR EUGNOR53KMD  750E ONVOY, LLC - OR 670   2024-05-12   
458-321 1 Phoenix OR   750E ONVOY, LLC - OR 670   2025-05-10   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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