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.

Silverado, CA

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
657-946 6   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2020-09-11   
657-946 7   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2020-09-11   
657-946 8   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2020-09-11   
657-946 9   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2020-09-11   
714-440 A BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
714-440 0   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2017-05-15   
714-440 1   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2017-05-15   
714-440 2   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2017-05-15   
714-440 3   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2017-05-15   
714-440 4   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2017-05-31   
714-440 5   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2017-06-12   
714-440 6   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2017-06-30   
714-440 7   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2017-07-17   
714-440 8   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2017-07-31   
714-440 9   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2018-04-08   
714-613 A ANHMCA01DS3  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
714-613 0   649C ONVOY, LLC - CA 730   2014-09-26   
714-613 1   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2008-02-12   
714-613 2   6529 T-MOBILE USA, INC. 730   2002-12-19   
714-613 3   6529 T-MOBILE USA, INC. 730   2004-09-16   
714-613 4   649C ONVOY, LLC - CA 730   2014-09-26   
714-613 5   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-05-25   
714-613 6   649C ONVOY, LLC - CA 730   2008-09-19   
714-613 7   508J CENTURYLINK COMMUNICATIONS, LLC 730   2014-07-02   
714-613 8   649C ONVOY, LLC - CA 730   2010-03-08   
714-613 9   7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
714-649 A SLVRCA11RS1  9740 PACIFIC BELL 730      
714-649 0   9740 PACIFIC BELL 730      
714-649 1   9740 PACIFIC BELL 730      
714-649 2   9740 PACIFIC BELL 730      
714-649 3   9740 PACIFIC BELL 730      
714-649 4   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2018-07-23   
714-649 5   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-11-12   
714-649 6   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-12-10   
714-649 7   516C AT&T CORP. 730   2006-06-30   
714-649 8   9262 UTILITY TELECOM GROUP, LLC - CA 730   2006-06-15   
714-649 9   9740 PACIFIC BELL 730      
714-707 A TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
714-707 0   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2003-06-01   
714-707 1   6529 T-MOBILE USA, INC. 730   2015-03-31   
714-707 2   981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-08-30   
714-707 3   981E BANDWIDTH.COM CLEC, LLC - CA 730   2012-06-18   
714-707 4   649C ONVOY, LLC - CA 730   2005-06-17   
714-707 5   649C ONVOY, LLC - CA 730   2005-06-17   
714-707 6   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2012-01-08   
714-707 7   6529 T-MOBILE USA, INC. 730   2006-05-01   
714-707 8   6529 T-MOBILE USA, INC. 730   2006-05-01   
714-707 9   6529 T-MOBILE USA, INC. 730   2005-03-23   
714-709 A BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
714-709 0   6529 T-MOBILE USA, INC. 730   2015-03-02   

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

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.