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: 432 [Rate centres in NPA 432] [Dial plan for NPA 432]

NXX: 340

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
432-340 A Big Spring TX MDLDTXMUXRX  903C ONVOY, LLC - TX 542   2024-08-03   
432-340 0 Big Spring TX MDLDTXMUXRX  903C ONVOY, LLC - TX 542   2024-08-03   
432-340 1 Big Spring TX   515J IP HORIZON LLC 542   2025-03-10   
432-340 2 Big Spring TX   515J IP HORIZON LLC 542   2025-03-10   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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