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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Switch: BUMUTXHM8MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
409-304 A Port Arthur TX 732J NUSO, LLC 562      
409-304 2 Port Arthur TX 732J NUSO, LLC 562   2023-11-25   
409-304 3 Port Arthur TX 732J NUSO, LLC 562   2023-04-09   
409-304 4 Port Arthur TX 732J NUSO, LLC 562   2023-11-25   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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