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: 590

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-590 A San Carlos-Belmont CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
650-590 0 San Carlos-Belmont CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
650-590 1 San Carlos-Belmont CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
650-590 2 San Carlos-Belmont CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
650-590 3 San Carlos-Belmont CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
650-590 4 San Carlos-Belmont CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2021-11-13   
650-590 5 San Carlos-Belmont CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
650-590 6 San Carlos-Belmont CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2021-11-13   
650-590 7 San Carlos-Belmont CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
650-590 8 San Carlos-Belmont CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
650-590 9 San Carlos-Belmont CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2014-05-26   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.