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: BUMTTXTEY0X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
409-257 A Beaumont TX 425J CSC WIRELESS, LLC 562      
409-257 2 Beaumont TX 425J CSC WIRELESS, LLC 562   2020-08-03   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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