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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: BKFDCA11DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
661-363 A Bakersfield: Main DA CA 9740 PACIFIC BELL 734      
661-364 A Bakersfield: Main DA CA 9740 PACIFIC BELL 734      
661-366 A Bakersfield: Main DA CA 9740 PACIFIC BELL 734      
661-808 A Bakersfield: Main DA CA 9740 PACIFIC BELL 734      
661-817 A Bakersfield: Main DA CA 9740 PACIFIC BELL 734      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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