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: SLNSCA01XTX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
831-718 A Monterey CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 736   2005-10-07   
831-998 A Salinas CA 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 736      

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

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