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: BKFDCAKTX8X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
661-516 A Bakersfield: Main DA CA 321J HD CARRIER LLC 734      
661-516 8 Bakersfield: Main DA CA 321J HD CARRIER LLC 734   2020-11-21   
661-516 9 Bakersfield: Main DA CA 321J HD CARRIER LLC 734   2020-11-21   
661-642 2 Delano CA 321J HD CARRIER LLC 734   2026-05-15   
661-642 3 Delano CA 321J HD CARRIER LLC 734   2026-05-15   
661-642 4 Delano CA 321J HD CARRIER LLC 734   2026-05-15   
661-642 5 Delano CA 321J HD CARRIER LLC 734   2026-05-15   
661-681 6 Bakersfield: North DA CA 321J HD CARRIER LLC 734   2026-05-15   
661-681 7 Bakersfield: North DA CA 321J HD CARRIER LLC 734   2026-05-15   
661-681 8 Bakersfield: North DA CA 321J HD CARRIER LLC 734   2026-05-15   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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