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.

San Francisco: Montrose-Evergreen DA, CA

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
628-399 6   649C ONVOY, LLC - CA 722   2021-08-09   
628-399 7   649C ONVOY, LLC - CA 722   2021-08-09   
628-399 8   624H ONVOY SPECTRUM, LLC 722   2021-11-13   
628-399 9   965H FRACTEL, LLC 722   2021-03-27   
628-432 A SNJUCACL7MD  965H FRACTEL, LLC 722      
628-432 0   433E SONIC TELECOM, LLC - CA 722   2020-11-16   
628-432 1   073H TELNYX LLC 722   2021-01-10   
628-432 2   624H ONVOY SPECTRUM, LLC 722   2020-11-16   
628-432 3   649C ONVOY, LLC - CA 722   2021-01-09   
628-432 4   624H ONVOY SPECTRUM, LLC 722   2020-11-16   
628-432 5   649C ONVOY, LLC - CA 722   2021-01-09   
628-432 6   649C ONVOY, LLC - CA 722   2021-01-09   
628-432 7   649C ONVOY, LLC - CA 722   2021-01-09   
628-432 8   965H FRACTEL, LLC 722   2020-11-15   
628-432 9   515J IP HORIZON LLC 722   2021-05-01   
628-754 A SNRSCA01KMD  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722      
628-754 0   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2023-03-16   
628-754 1   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2023-03-16   
628-754 2   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2023-03-16   
628-754 3   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2023-03-16   
628-754 4   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2023-03-16   
628-754 5   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2023-03-16   
628-754 6   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2023-03-16   
628-754 7   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2023-03-16   
628-754 8   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2023-03-16   
628-754 9   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2023-03-16   
628-758 A SNJUCACL7MD  965H FRACTEL, LLC 722      
628-758 0   649C ONVOY, LLC - CA 722   2020-02-10   
628-758 1   5562 METROPCS, INC. 722   2019-08-11   
628-758 2   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2019-06-26   
628-758 3   649C ONVOY, LLC - CA 722   2020-02-10   
628-758 4   197D VONAGE AMERICA LLC 722   2020-07-15   
628-758 5   5562 METROPCS, INC. 722   2020-08-11   
628-758 6   965H FRACTEL, LLC 722   2019-05-14   
628-758 7   649C ONVOY, LLC - CA 722   2019-10-05   
628-758 8   6529 T-MOBILE USA, INC. 722   2019-10-25   
628-758 9   197D VONAGE AMERICA LLC 722   2020-07-09   
628-777 A SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
628-777 0   515J IP HORIZON LLC 722   2015-07-13   
628-777 1   649C ONVOY, LLC - CA 722   2016-03-01   
628-777 2   981E BANDWIDTH.COM CLEC, LLC - CA 722   2016-07-17   
628-777 3   981E BANDWIDTH.COM CLEC, LLC - CA 722   2016-07-17   
628-777 4   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2016-07-01   
628-777 5   981E BANDWIDTH.COM CLEC, LLC - CA 722   2016-08-25   
628-777 6   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2015-06-19   
628-777 7   649C ONVOY, LLC - CA 722   2015-03-21   
628-777 8   6529 T-MOBILE USA, INC. 722   2015-03-24   
628-777 9   6529 T-MOBILE USA, INC. 722   2015-03-24   
628-788 A SNJUCACL7MD  965H FRACTEL, LLC 722      
628-788 0   939H COMMIO, LLC 722   2021-08-31   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.