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.

NPA: 408 [Rate centres in NPA 408] [Dial plan for NPA 408]

NXX: 643

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
408-643 A San Jose: North DA CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
408-643 0 San Jose: North DA CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2012-01-09   
408-643 1 San Jose: North DA CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2012-11-02   
408-643 2 San Jose: North DA CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2012-11-02   
408-643 3 San Jose: North DA CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2012-11-02   
408-643 4 San Jose: North DA CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2011-12-20   
408-643 5 San Jose: North DA CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2011-12-20   
408-643 6 San Jose: North DA CA   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722   2011-12-20   
408-643 7 San Jose: North DA CA   649C ONVOY, LLC - CA 722   2011-12-22   
408-643 8 San Jose: North DA CA   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722   2011-12-20   
408-643 9 San Jose: North DA CA   6529 T-MOBILE USA, INC. 722   2011-12-19   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.