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.

Montebello, 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
323-358 9   6529 T-MOBILE USA, INC. 730   2012-02-20   
323-359 A TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
323-359 0   899D METROPCS NETWORKS, LLC 730      
323-359 1   6529 T-MOBILE USA, INC. 730      
323-359 2   899D METROPCS NETWORKS, LLC 730      
323-359 3   899D METROPCS NETWORKS, LLC 730      
323-359 4   899D METROPCS NETWORKS, LLC 730      
323-359 5   899D METROPCS NETWORKS, LLC 730      
323-359 6   899D METROPCS NETWORKS, LLC 730      
323-359 7   899D METROPCS NETWORKS, LLC 730      
323-359 8   899D METROPCS NETWORKS, LLC 730      
323-359 9   6529 T-MOBILE USA, INC. 730      
323-365 A CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
323-385 A TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
323-385 0   899D METROPCS NETWORKS, LLC 730      
323-385 1   899D METROPCS NETWORKS, LLC 730      
323-385 2   899D METROPCS NETWORKS, LLC 730      
323-385 3   6529 T-MOBILE USA, INC. 730      
323-385 4   6529 T-MOBILE USA, INC. 730      
323-385 5   899D METROPCS NETWORKS, LLC 730      
323-385 6   899D METROPCS NETWORKS, LLC 730      
323-385 7   899D METROPCS NETWORKS, LLC 730      
323-385 8   899D METROPCS NETWORKS, LLC 730      
323-385 9   6529 T-MOBILE USA, INC. 730      
323-399 A TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
323-399 0   899D METROPCS NETWORKS, LLC 730   2007-04-23   
323-399 1   899D METROPCS NETWORKS, LLC 730   2007-04-23   
323-399 2   899D METROPCS NETWORKS, LLC 730   2007-04-23   
323-399 3   899D METROPCS NETWORKS, LLC 730   2007-04-23   
323-399 4   899D METROPCS NETWORKS, LLC 730   2007-04-09   
323-399 5   899D METROPCS NETWORKS, LLC 730   2007-04-09   
323-399 6   899D METROPCS NETWORKS, LLC 730   2007-04-09   
323-399 7   899D METROPCS NETWORKS, LLC 730   2007-04-09   
323-399 8   899D METROPCS NETWORKS, LLC 730   2007-04-09   
323-399 9   6529 T-MOBILE USA, INC. 730   2007-04-09   
323-400 A BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
323-400 0   6529 T-MOBILE USA, INC. 730   2019-10-25   
323-400 1   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2019-12-14   
323-400 2   981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-10-28   
323-400 3   981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-10-28   
323-400 4   981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-12-06   
323-400 5   981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-12-31   
323-400 6   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2011-07-17   
323-400 7   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2011-09-02   
323-400 8   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2011-09-02   
323-400 9   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2011-09-16   
323-416 A LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730      
323-416 0   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2012-06-10   
323-416 1   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2012-06-10   
323-416 2   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2012-06-10   
323-416 3   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2012-06-10   
323-416 4   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2012-06-10   
323-416 5   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2012-06-10   
323-416 6   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2012-06-10   
323-416 7   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2012-06-10   
323-416 8   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2012-06-10   
323-416 9   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2012-06-10   
323-427 A TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
323-427 0   899D METROPCS NETWORKS, LLC 730   2011-06-06   
323-427 1   899D METROPCS NETWORKS, LLC 730   2011-06-06   
323-427 2   7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2012-06-24   
323-427 3   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2012-09-02   
323-427 4   6529 T-MOBILE USA, INC. 730   2012-07-19   
323-427 5   899D METROPCS NETWORKS, LLC 730   2011-11-05   
323-427 6   899D METROPCS NETWORKS, LLC 730   2011-11-05   
323-427 7   899D METROPCS NETWORKS, LLC 730   2011-11-05   
323-427 8   899D METROPCS NETWORKS, LLC 730   2011-11-05   
323-427 9   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2012-08-02   
323-430 A BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
323-430 0   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2013-04-26   
323-430 1   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2013-04-26   
323-430 2   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2013-04-26   
323-430 3   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2013-04-26   
323-430 4   576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2013-08-22   
323-430 5   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2013-04-29   
323-430 6   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2013-04-29   
323-430 7   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2013-04-26   
323-430 8   981E BANDWIDTH.COM CLEC, LLC - CA 730   2013-05-25   
323-430 9   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2014-03-07   
323-434 A CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
323-434 0   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2007-05-12   
323-434 1   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2007-05-12   
323-434 2   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2007-05-12   
323-434 3   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2007-05-12   
323-434 4   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2007-05-12   
323-434 5   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2007-05-12   
323-434 6   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2007-05-12   
323-434 7   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2007-05-12   
323-434 8   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2007-05-12   
323-434 9   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2007-05-12   
323-437 A TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
323-437 0   899D METROPCS NETWORKS, LLC 730   2013-01-22   
323-437 1   899D METROPCS NETWORKS, LLC 730   2013-01-22   
323-437 2   899D METROPCS NETWORKS, LLC 730   2013-01-22   
323-437 3   899D METROPCS NETWORKS, LLC 730   2013-01-22   
323-437 4   899D METROPCS NETWORKS, LLC 730   2013-03-08   
323-437 5   899D METROPCS NETWORKS, LLC 730   2013-03-08   
323-437 6   899D METROPCS NETWORKS, LLC 730   2013-03-08   
323-437 7   899D METROPCS NETWORKS, LLC 730   2013-03-08   
323-437 8   899D METROPCS NETWORKS, LLC 730   2013-01-19   

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

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.