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.

Lancaster, CA

<< 1 2 3 4 5 6 7 8 9 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
661-643 4   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-08-18   
661-643 5   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-08-18   
661-643 6   649C ONVOY, LLC - CA 730   2025-04-06   
661-643 7   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-03-15   
661-643 8   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2026-01-23   
661-646 A SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2024-08-26   
661-646 0   649C ONVOY, LLC - CA 730   2024-08-26   
661-646 1   624H ONVOY SPECTRUM, LLC 730   2025-01-30   
661-646 2   649C ONVOY, LLC - CA 730   2025-02-01   
661-646 3   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-22   
661-646 4   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-22   
661-646 5   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-22   
661-646 6   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-22   
661-646 7   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-10-05   
661-646 8   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-10-05   
661-646 9   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-10-05   
661-674 A TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
661-674 0   6529 T-MOBILE USA, INC. 730   2011-05-08   
661-674 1   515J IP HORIZON LLC 730      
661-674 2   515J IP HORIZON LLC 730      
661-674 3   7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730   2010-08-18   
661-674 4   515J IP HORIZON LLC 730      
661-674 5   6529 T-MOBILE USA, INC. 730   2004-06-02   
661-674 6   6529 T-MOBILE USA, INC. 730   2003-12-14   
661-674 7   6529 T-MOBILE USA, INC. 730   2003-04-05   
661-674 8   6529 T-MOBILE USA, INC. 730   2004-04-21   
661-674 9   6529 T-MOBILE USA, INC. 730   2003-04-05   
661-676 A   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-05-05   
661-676 0   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-05-05   
661-676 1   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-05-05   
661-676 2   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-05-05   
661-676 3   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2026-01-23   
661-676 4   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-08-22   
661-676 5   624H ONVOY SPECTRUM, LLC 730   2025-05-16   
661-676 7   624H ONVOY SPECTRUM, LLC 730   2025-05-16   
661-676 8   624H ONVOY SPECTRUM, LLC 730   2025-05-16   
661-683 A   649C ONVOY, LLC - CA 730   2025-10-25   
661-683 0   649C ONVOY, LLC - CA 730   2025-10-25   
661-683 1   490J DISH WIRELESS, LLC 730   2025-10-27   
661-683 2   516C AT&T CORP. 730   2026-01-06   
661-683 3   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-12-15   
661-683 8   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-11-14   
661-683 9   649C ONVOY, LLC - CA 730   2025-11-09   
661-718 A QZHLCAXF94K  2319 FRONTIER CALIFORNIA INC. 730      
661-718 0   2319 FRONTIER CALIFORNIA INC. 730      
661-718 1   2319 FRONTIER CALIFORNIA INC. 730      
661-718 2   2319 FRONTIER CALIFORNIA INC. 730      
661-718 3   2319 FRONTIER CALIFORNIA INC. 730      
661-718 4   649C ONVOY, LLC - CA 730   2006-01-14   
661-718 5   6529 T-MOBILE USA, INC. 730   2007-09-28   

<< 1 2 3 4 5 6 7 8 9 >>

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.