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: SCRMCA01XFZ

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-422 A Colfax: Weimar DA CA 612K CSC VOICE, LLC 726      
530-446 A Grass Valley: Main DA CA 612K CSC VOICE, LLC 726      
530-489 A Homewood CA 612K CSC VOICE, LLC 726      
530-492 A Auburn: Main DA CA 612K CSC VOICE, LLC 726      
530-536 A Truckee CA 612K CSC VOICE, LLC 726      
530-728 A Grass Valley: South DA CA 612K CSC VOICE, LLC 726      

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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