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: 390

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
430-390 A Longview TX LGVWTXBA51Z  700J WAVENATION, LLC 554   2025-09-11   
430-390 0 Longview TX LGVWTXBA51Z  700J WAVENATION, LLC 554   2025-09-11   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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