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: CHICCA01XKX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-331 A Yreka CA 515J IP HORIZON LLC 724      
530-361 A Willows CA 515J IP HORIZON LLC 724      
530-413 A Paradise CA 515J IP HORIZON LLC 724      
530-540 A Chico CA 515J IP HORIZON LLC 724      
530-568 A Mount Shasta CA 515J IP HORIZON LLC 724      
530-646 A Redding CA 515J IP HORIZON LLC 724      
530-737 A Red Bluff CA 515J IP HORIZON LLC 724      
530-773 A Loyalton CA 515J IP HORIZON LLC 724      
530-773 9 Loyalton CA 515J IP HORIZON LLC 724   2022-06-17   
530-776 A Anderson CA 515J IP HORIZON LLC 724      
530-793 A Paskenta CA 515J IP HORIZON LLC 724      
530-857 A Chico CA 515J IP HORIZON LLC 724      
530-861 A Vina CA 515J IP HORIZON LLC 724      
530-962 A Shasta Lake CA 515J IP HORIZON LLC 724      
530-988 A Orland CA 515J IP HORIZON LLC 724      

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

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