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: 365

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
430-365 A Jefferson TX LGVWTXPLXMY  793K TWC IP ENABLED SERVICES, LLC 554      
430-365 1 Jefferson TX LGVWTXPLXMY  793K TWC IP ENABLED SERVICES, LLC 554   2024-10-13   
430-365 7 Jefferson TX   824J OPENTACT INC. 554   2026-09-13   

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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