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: 597

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-597 A San Carlos-Belmont CA SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722      
650-597 0 San Carlos-Belmont CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2014-07-06   
650-597 1 San Carlos-Belmont CA SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722   2008-12-07   
650-597 2 San Carlos-Belmont CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2014-07-06   
650-597 3 San Carlos-Belmont CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2014-07-06   
650-597 4 San Carlos-Belmont CA OKLDCAMP1MD  4733 PAETEC COMMUNICATIONS, INC. - CA 722   2011-11-16   
650-597 5 San Carlos-Belmont CA SNRTCAHFDS0  433E SONIC TELECOM, LLC - CA 722   2012-12-22   
650-597 6 San Carlos-Belmont CA SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2013-04-07   
650-597 7 San Carlos-Belmont CA SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2013-04-07   
650-597 8 San Carlos-Belmont CA OKLDCAMP1MD  4733 PAETEC COMMUNICATIONS, INC. - CA 722   2016-05-10   
650-597 9 San Carlos-Belmont CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2016-08-28   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.