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: CHLKCAXFRS3

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
760-428 A Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      
760-428 3 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730   2009-12-11   
760-428 4 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730   2009-12-11   
760-428 5 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730   2009-12-11   
760-446 A Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      
760-446 0 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      
760-446 1 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      
760-446 2 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      
760-446 3 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      
760-446 4 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      
760-446 5 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      
760-446 6 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      
760-446 7 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      
760-499 A Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      
760-499 1 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      
760-499 3 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730   2005-07-03   
760-499 5 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      
760-499 7 Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      
760-939 A Ridgecrest CA 4420 FRONTIER CALIFORNIA INC. 730      

Last updated: Sat, 15 Nov 2025 03:38:44 UTC

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