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: 377

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
430-377 A Longview TX LGVWTXBADS2  177F PEERLESS NETWORK OF TEXAS, LLC - TX 554   2025-04-26   
430-377 0 Longview TX LGVWTXBADS2  177F PEERLESS NETWORK OF TEXAS, LLC - TX 554   2025-04-26   
430-377 1 Longview TX   903C ONVOY, LLC - TX 554   2026-08-21   
430-377 2 Longview TX   903C ONVOY, LLC - TX 554   2026-08-21   
430-377 3 Longview TX   903C ONVOY, LLC - TX 554   2026-08-21   
430-377 4 Longview TX   903C ONVOY, LLC - TX 554   2026-08-21   

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

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