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.

Ione, CA

<< 1 2

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
209-790 5 SKTNCA01X6Z  516C AT&T CORP. 738   2011-06-27   
209-790 6 SKTNCA01XFY  649C ONVOY, LLC - CA 738   2006-01-14   
209-790 7 SKTNCA01XFY  649C ONVOY, LLC - CA 738   2011-05-02   
209-790 8 SKTNCA01XFY  649C ONVOY, LLC - CA 738   2013-03-22   
209-790 9 SKTNCAGSGT0  6010 NEW CINGULAR WIRELESS PCS, LLC 738   2014-03-19   
209-964 A SKTNCAGSGT0  6010 NEW CINGULAR WIRELESS PCS, LLC 738      
209-964 0 SKTNCACZ4MD  939H COMMIO, LLC 738   2022-09-11   
209-964 1 SKTNCA01XIZ  073H TELNYX LLC 738   2023-04-28   
209-964 2 SKTNCASLAMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 738   2024-11-20   
209-964 3 SKTNCA01XKZ  624H ONVOY SPECTRUM, LLC 738   2024-10-23   
209-964 4 SKTNCA01XKZ  624H ONVOY SPECTRUM, LLC 738   2024-10-23   
209-964 5 SKTNCA01XPY  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2022-08-10   
209-964 6 SKTNCA01XKZ  624H ONVOY SPECTRUM, LLC 738   2024-10-23   
209-964 7   6010 NEW CINGULAR WIRELESS PCS, LLC 738   2026-03-06   
209-964 8 SKTNCACZDS2  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 738   2022-08-10   
209-964 9 SKTNCAGSGT0  6010 NEW CINGULAR WIRELESS PCS, LLC 738   2022-08-10   

<< 1 2

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.