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: 559 [Rate centres in NPA 559] [Dial plan for NPA 559]

NXX: 838

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
559-838 A Exeter CA FRSMCA150MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 728      
559-838 0 Exeter CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 728      
559-838 1 Exeter CA   321J HD CARRIER LLC 728   2016-08-26   
559-838 2 Exeter CA   321J HD CARRIER LLC 728   2016-08-26   
559-838 3 Exeter CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 728   2005-02-17   
559-838 4 Exeter CA   649C ONVOY, LLC - CA 728   2019-02-24   
559-838 5 Exeter CA   649C ONVOY, LLC - CA 728   2019-02-24   
559-838 6 Exeter CA   981E BANDWIDTH.COM CLEC, LLC - CA 728   2009-01-14   
559-838 7 Exeter CA   145J TERRA NOVA TELECOM INC. 728   2024-10-12   
559-838 8 Exeter CA   073H TELNYX LLC 728   2018-06-27   
559-838 9 Exeter CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 728      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.