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.

South San Francisco, CA

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
650-754 3 OKLECAZV1MD  5562 METROPCS, INC. 722   2008-12-13   
650-754 4 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2008-10-18   
650-754 5 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2008-10-18   
650-754 6 OKLDCA03XOY  394L COMCAST PHONE OF CALIFORNIA, LLC 722   2011-09-30   
650-754 7 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2008-10-18   
650-754 8 SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2010-07-18   
650-754 9 COLACA01DS0  9740 PACIFIC BELL 722      
650-760 A SNRSCA01KMD  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722      
650-760 0 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2023-08-07   
650-760 1 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2023-09-10   
650-760 2 SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2025-01-19   
650-760 3 SNFCCA21XNZ  624H ONVOY SPECTRUM, LLC 722   2025-05-16   
650-760 4 SNFCCA21XNZ  624H ONVOY SPECTRUM, LLC 722   2025-05-16   
650-760 5 SNRTCAHFDS0  433E SONIC TELECOM, LLC - CA 722   2024-03-08   
650-760 6 SNRSCA01KMD  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2023-08-06   
650-760 7 SNFCCA21XNZ  624H ONVOY SPECTRUM, LLC 722   2025-05-16   
650-760 8 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2023-09-10   
650-760 9 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2023-09-10   
650-763 A SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722      
650-763 0 SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2014-05-18   
650-763 1 OKLDCA03XOY  394L COMCAST PHONE OF CALIFORNIA, LLC 722   2008-07-18   
650-763 2 SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2009-12-31   
650-763 3 SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2010-06-07   
650-763 4 SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2010-04-01   
650-763 5 SNFCCAFJDS0  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2010-11-15   
650-763 6 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2008-08-18   
650-763 7 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2008-09-16   
650-763 8 SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2008-12-08   
650-763 9 SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2011-12-29   
650-784 A OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
650-784 0 SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2013-07-14   
650-784 1 OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
650-784 2 SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2011-09-06   
650-784 3 OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
650-784 4 SNVACAHZ0MD  508J CENTURYLINK COMMUNICATIONS, LLC 722   2014-10-04   
650-784 5 OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
650-784 6 OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
650-784 7 OKLDCAMP2MD  829J PAETEC ITEL, LLC 722   2012-12-03   
650-784 8 OKLECAZV1MD  5562 METROPCS, INC. 722      
650-784 9 OKLECAZV1MD  5562 METROPCS, INC. 722      
650-794 A SNBUCA02DS0  9740 PACIFIC BELL 722      
650-797 A SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
650-797 0 SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2015-01-19   
650-797 1 SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2015-01-19   
650-797 2 SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2015-01-19   
650-797 3 SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2015-10-29   
650-797 4 SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2015-10-29   
650-797 5 SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2015-10-28   
650-797 6 SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2015-10-28   
650-797 7 SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2015-08-11   

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

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.