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.

Millbrae, CA

1 2 3 4 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
650-204 A SNFCCANVDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
650-204 0   981E BANDWIDTH.COM CLEC, LLC - CA 722   2009-11-09   
650-204 1   981E BANDWIDTH.COM CLEC, LLC - CA 722   2009-11-09   
650-204 2   7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
650-204 3   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2006-03-10   
650-204 4   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2005-10-07   
650-204 5   649C ONVOY, LLC - CA 722   2005-03-14   
650-204 6   7262 XO CALIFORNIA, INC. 722   2005-09-15   
650-204 7   7262 XO CALIFORNIA, INC. 722   2005-09-15   
650-204 8   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2010-02-21   
650-204 9   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2005-08-18   
650-231 A FRMTCAEDDS0  7262 XO CALIFORNIA, INC. 722      
650-231 0   7262 XO CALIFORNIA, INC. 722      
650-231 1   7262 XO CALIFORNIA, INC. 722      
650-231 2   7262 XO CALIFORNIA, INC. 722   2010-10-11   
650-231 3   485E ASTOUND BROADBAND, LLC - CA 722   2019-10-26   
650-231 4   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2009-06-16   
650-231 7   3662 PACIFIC CENTREX SERVICES, INC. - CA 722   2006-12-01   
650-231 8   516C AT&T CORP. 722   2006-06-30   
650-239 A   649C ONVOY, LLC - CA 722      
650-239 0   981E BANDWIDTH.COM CLEC, LLC - CA 722      
650-239 1   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722      
650-239 2   649C ONVOY, LLC - CA 722   2020-06-07   
650-239 3   649C ONVOY, LLC - CA 722      
650-239 4   649C ONVOY, LLC - CA 722      
650-239 5   649C ONVOY, LLC - CA 722   2007-09-07   
650-239 6   981E BANDWIDTH.COM CLEC, LLC - CA 722   2010-08-14   
650-239 7   649C ONVOY, LLC - CA 722   2009-12-19   
650-239 8   649C ONVOY, LLC - CA 722   2020-06-07   
650-239 9   7610 COMCAST PHONE OF CALIFORNIA, LLC - CA 722   2010-09-25   
650-259 A MLBRCA11DS0  9740 PACIFIC BELL 722      
650-259 0   9740 PACIFIC BELL 722      
650-259 1   9740 PACIFIC BELL 722      
650-259 2   9740 PACIFIC BELL 722      
650-259 3   9740 PACIFIC BELL 722      
650-259 5   9740 PACIFIC BELL 722      
650-259 6   9740 PACIFIC BELL 722      
650-259 7   9740 PACIFIC BELL 722      
650-259 8   9740 PACIFIC BELL 722      
650-259 9   9740 PACIFIC BELL 722      
650-302 A SNFDCACVCM7  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
650-307 A OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      
650-307 0   6529 T-MOBILE USA, INC. 722      
650-307 2   6529 T-MOBILE USA, INC. 722      
650-307 3   6529 T-MOBILE USA, INC. 722      
650-307 4   6529 T-MOBILE USA, INC. 722      
650-307 5   981E BANDWIDTH.COM CLEC, LLC - CA 722   2011-04-01   
650-307 6   981E BANDWIDTH.COM CLEC, LLC - CA 722   2011-04-01   
650-307 7   6529 T-MOBILE USA, INC. 722      
650-307 8   6529 T-MOBILE USA, INC. 722      

1 2 3 4 >>

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.