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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: SCRMCA0110Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-204 A Davis CA 515J IP HORIZON LLC 726      
530-207 A Woodland CA 515J IP HORIZON LLC 726      
530-213 A North Tahoe: Brockway DA CA 515J IP HORIZON LLC 726      
530-214 A Truckee CA 515J IP HORIZON LLC 726      
530-217 A Auburn: Main DA CA 515J IP HORIZON LLC 726      
530-334 A Georgetown CA 515J IP HORIZON LLC 726      
530-501 A Williams CA 515J IP HORIZON LLC 726      
530-502 A Princeton CA 515J IP HORIZON LLC 726      
530-503 A Placerville: South DA CA 515J IP HORIZON LLC 726      
530-535 A Alleghany CA 515J IP HORIZON LLC 726      
530-948 A Meridian CA 515J IP HORIZON LLC 726      
707-679 A Dixon CA 515J IP HORIZON LLC 726      
916-902 A Sacramento: Main DA CA 515J IP HORIZON LLC 726      

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

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