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: 424 [Rate centres in NPA 424] [Dial plan for NPA 424]

NXX: 548

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-548 A Malibu CA   649C ONVOY, LLC - CA 730      
424-548 2 Malibu CA   516C AT&T CORP. 730   2026-01-06   
424-548 8 Malibu CA   649C ONVOY, LLC - CA 730   2025-10-13   

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

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