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: 650 [Rate centres in NPA 650] [Dial plan for NPA 650]

NXX: 397

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-397 A Los Altos CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
650-397 0 Los Altos CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2015-11-10   
650-397 1 Los Altos CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2011-05-26   
650-397 2 Los Altos CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2011-05-26   
650-397 3 Los Altos CA OKLDCAEBDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722   2007-06-26   
650-397 4 Los Altos CA SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2010-04-01   
650-397 5 Los Altos CA OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722   2011-10-03   
650-397 6 Los Altos CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2012-08-02   
650-397 7 Los Altos CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2014-11-06   
650-397 8 Los Altos CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2012-09-01   
650-397 9 Los Altos CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2013-06-21   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.