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: LSANCARCD4S

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
213-283 A Los Angeles: DA 01 CA 973E RACE TELECOMMUNICATIONS, INC. - CA 730      
213-283 1 Los Angeles: DA 01 CA 973E RACE TELECOMMUNICATIONS, INC. - CA 730   2008-11-21   
442-296 A Crowley Lake CA 973E RACE TELECOMMUNICATIONS, INC. - CA 730      
442-296 0 Crowley Lake CA 973E RACE TELECOMMUNICATIONS, INC. - CA 730   2016-12-25   
442-298 A Trona CA 973E RACE TELECOMMUNICATIONS, INC. - CA 730      
442-298 0 Trona CA 973E RACE TELECOMMUNICATIONS, INC. - CA 730   2016-12-25   
661-488 9 Lancaster CA 973E RACE TELECOMMUNICATIONS, INC. - CA 730   2016-11-20   
760-249 9 Wrightwood: Wrightwood DA CA 973E RACE TELECOMMUNICATIONS, INC. - CA 730   2016-11-20   
760-706 8 Wrightwood: Phelan DA CA 973E RACE TELECOMMUNICATIONS, INC. - CA 730   2016-11-20   
760-762 2 Boron CA 973E RACE TELECOMMUNICATIONS, INC. - CA 730   2016-11-14   
760-965 1 Mammoth Lakes CA 973E RACE TELECOMMUNICATIONS, INC. - CA 730   2016-11-14   

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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