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: SNJUCACLIMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
628-287 A San Francisco: Central DA CA 598J FIVE9, INC. 722      
628-287 0 San Francisco: Central DA CA 598J FIVE9, INC. 722   2023-05-22   

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

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