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: BKFDCA12DS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
661-271 A Mojave CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-278 A Edwards CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-279 A Rosamond CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-616 A Bakersfield: Main DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-617 A Bakersfield: South DA CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-668 A Earlimart CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-771 A Tehachapi CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-772 A Wasco CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-776 A Shafter CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-777 A Lebec CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-778 A Delano CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      
661-779 A Arvin CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 734      

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

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