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: CHICCA01XQX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-203 A Elk Creek CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 724      
530-433 A Chico CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 724      
530-603 A Bangor CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 724      
530-610 A Redding CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 724      
530-717 A Chico CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 724      
530-781 A Chico CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 724      
530-791 A Anderson CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 724      
530-810 A Biggs CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 724      
530-856 A Chico CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 724      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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