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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Jim Hogg, TX

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
430-366 A LGVWTXPLXMY  793K TWC IP ENABLED SERVICES, LLC 554      
430-366 1 LGVWTXPLXMY  793K TWC IP ENABLED SERVICES, LLC 554   2024-11-03   
430-366 6 LGVWTXBA52Z  145J TERRA NOVA TELECOM INC. 554   2026-01-10   
903-967 A DRCKTXXADS0  2130 PEOPLES TEL. COOP. 554      

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

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