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: 430 [Rate centres in NPA 430] [Dial plan for NPA 430]

NXX: 378

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
430-378 A De Berry TX   583C TIME WARNER CBLE INFO SVC (TX) DBA TIME WARNER CBL 554   2025-06-29   
430-378 1 De Berry TX   583C TIME WARNER CBLE INFO SVC (TX) DBA TIME WARNER CBL 554   2025-06-29   

Last updated: Fri, 10 Jul 2026 02:55:48 UTC

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