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: RDCYCAGDDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
415-343 A San Francisco: Central DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
415-365 A San Francisco: Central DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
415-450 A San Rafael CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
415-659 A San Francisco: Central DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
415-680 A San Francisco: Montrose-Evergreen DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
415-840 A San Francisco: Juniper DA CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
650-226 A San Carlos-Belmont CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
650-238 A South San Francisco CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
650-263 A Moss Beach CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
650-427 A Palo Alto CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722   2007-02-10   
650-429 A Mountain View CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
650-481 A Redwood City CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
650-651 A Millbrae CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
650-653 A San Mateo CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
650-687 A Palo Alto CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      

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

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