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: BKFDCA12XRX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
661-377 A Bakersfield: Main DA CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 734      
661-381 A Bakersfield: South DA CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 734      
661-390 A Arvin CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 734      
661-410 A Bakersfield: North DA CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 734      
661-431 A Bakersfield: Main DA CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 734      
661-493 A Bakersfield: Main DA CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 734      
661-590 A Wasco CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 734      
661-595 A Bakersfield: Main DA CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 734      
661-649 A Arvin CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 734      
661-687 A Bakersfield: South DA CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 734      
661-716 A Bakersfield: Main DA CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 734      
661-847 A Bakersfield: South DA CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 734      

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

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