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: BKFDCA11RMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
661-448 A Bakersfield: Main DA CA 551G NUSO, LLC 734      
661-448 1 Bakersfield: Main DA CA 551G NUSO, LLC 734   2012-12-30   

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

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