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: 350 [Rate centres in NPA 350] [Dial plan for NPA 350]

NXX: 209

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
350-209 A Valley Springs CA SKTNCACZDS2  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 738      
350-209 0 Valley Springs CA SKTNCACZ4MD  939H COMMIO, LLC 738   2023-08-19   
350-209 1 Valley Springs CA SKTNCACZ4MD  939H COMMIO, LLC 738   2023-08-19   
350-209 2 Valley Springs CA SKTNCACZ4MD  939H COMMIO, LLC 738   2023-08-19   
350-209 3 Valley Springs CA SKTNCACZ4MD  939H COMMIO, LLC 738   2023-08-19   
350-209 4 Valley Springs CA SKTNCA01XIZ  073H TELNYX LLC 738   2023-11-09   
350-209 5 Valley Springs CA SKTNCA01XFY  649C ONVOY, LLC - CA 738   2024-07-27   
350-209 6 Valley Springs CA SKTNCA01XKZ  624H ONVOY SPECTRUM, LLC 738   2023-12-15   
350-209 8 Valley Springs CA SKTNCACZ4MD  939H COMMIO, LLC 738   2023-08-29   
350-209 9 Valley Springs CA SKTNCACZDS2  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 738   2023-06-22   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.