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 Mateo, CA

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
650-418 9   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2020-04-20   
650-425 A HYWRCA115MD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722      
650-425 0   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2012-02-20   
650-425 1   258E YMAX COMMUNICATIONS CORP. - CA 722   2011-04-26   
650-425 2   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722      
650-425 3   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2005-09-22   
650-425 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722      
650-425 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722      
650-425 6   7240 MCI WORLDCOM COMMUNICATIONS, INC., CA 722      
650-425 7   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2005-09-22   
650-425 8   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722      
650-425 9   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2011-12-11   
650-430 A OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      
650-431 A OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      
650-431 0   649C ONVOY, LLC - CA 722   2016-01-13   
650-431 1   649C ONVOY, LLC - CA 722   2016-01-13   
650-431 2   649C ONVOY, LLC - CA 722   2016-02-22   
650-431 3   649C ONVOY, LLC - CA 722   2016-02-22   
650-431 4   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2016-02-19   
650-431 5   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2016-02-19   
650-431 6   6529 T-MOBILE USA, INC. 722   2016-03-31   
650-431 7   649C ONVOY, LLC - CA 722   2016-04-24   
650-431 8   6529 T-MOBILE USA, INC. 722   2015-11-07   
650-431 9   6529 T-MOBILE USA, INC. 722   2015-11-07   
650-432 A SNMTCA11DS0  9740 PACIFIC BELL 722      
650-435 A FRFECABBCM0  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
650-435 0   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2015-04-02   
650-435 1   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2015-04-02   
650-435 2   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2015-04-02   
650-435 3   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2015-04-02   
650-435 4   649C ONVOY, LLC - CA 722   2016-04-24   
650-435 5   318J COMCAST IP PHONE LLC 722   2015-04-03   
650-435 6   222H LOCAL ACCESS SERVICES LLC - CA 722   2016-09-14   
650-435 7   649C ONVOY, LLC - CA 722   2016-04-24   
650-435 8   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2015-06-07   
650-435 9   6529 T-MOBILE USA, INC. 722   2015-05-15   
650-436 A SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
650-436 0   4129 O1 COMMUNICATIONS, INC. - CA 722   2015-10-24   
650-436 1   4733 PAETEC COMMUNICATIONS, INC. - CA 722   2016-07-05   
650-436 2   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2016-07-03   
650-436 3   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2016-07-03   
650-436 4   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2015-12-18   
650-436 5   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2015-12-18   
650-436 6   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2016-04-09   
650-436 7   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2016-01-03   
650-436 8   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2015-10-23   
650-436 9   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2015-10-23   
650-437 A SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
650-437 0   981E BANDWIDTH.COM CLEC, LLC - CA 722   2014-05-01   
650-437 1   981E BANDWIDTH.COM CLEC, LLC - CA 722   2014-05-01   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 >>

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.