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: HYWRCAMCDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
408-606 A San Jose: West DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722   2012-06-09   
415-963 A San Francisco: Central DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
510-214 A Oakland: Alameda DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
510-269 A Oakland: Fruitvale DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
510-285 A Oakland: Main-Piedmont DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
510-404 A Fremont-Newark: Greenleaf DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
510-572 A Fremont-Newark: Oliver DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
510-731 A Hayward CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
510-771 A Fremont-Newark: Oliver DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
510-789 A Fremont-Newark: Main DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
510-877 A Oakland: Trinidad DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
510-982 A Oakland: Berkeley DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
650-214 A Mountain View CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
650-253 A Mountain View CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
669-223 A San Jose: West DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722   2012-12-17   
707-244 A St Helena CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
707-430 A Fairfield-Suisun CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
707-536 A Santa Rosa CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
707-561 A Vallejo CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
925-255 A Orinda CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
925-298 A Lafayette CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
925-364 A Dublin-San Ramon CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
925-557 A Dublin-San Ramon CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
925-826 A Concord CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
925-854 A Danville CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
925-948 A Walnut Creek CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
925-983 A Bishop Ranch CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

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