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: 442

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-442 A South San Francisco CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
650-442 0 South San Francisco CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2022-11-26   
650-442 1 South San Francisco CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2022-11-26   
650-442 2 South San Francisco CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2022-11-26   
650-442 3 South San Francisco CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2022-11-26   
650-442 4 South San Francisco CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2022-11-26   
650-442 5 South San Francisco CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2022-11-26   
650-442 6 South San Francisco CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2023-05-07   
650-442 7 South San Francisco CA SNJUCACL00Z  490J DISH WIRELESS, LLC 722   2023-06-08   
650-442 8 South San Francisco CA SNFCCA21XNZ  624H ONVOY SPECTRUM, LLC 722   2024-08-18   
650-442 9 South San Francisco CA SNJUCACL4MD  939H COMMIO, LLC 722   2022-11-27   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.