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: 368

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
408-368 A Sunnyvale CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
408-368 0 Sunnyvale CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
408-368 1 Sunnyvale CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2003-02-03   
408-368 2 Sunnyvale CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2004-08-05   
408-368 3 Sunnyvale CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2006-02-23   
408-368 4 Sunnyvale CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2005-08-25   
408-368 5 Sunnyvale CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2006-02-23   
408-368 6 Sunnyvale CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
408-368 7 Sunnyvale CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
408-368 8 Sunnyvale CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
408-368 9 Sunnyvale CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.