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.

Ontario, CA

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
909-443 9 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2014-10-31   
909-456 A ONTRCAFXDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730      
909-456 0 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2002-12-16   
909-456 1 ONTRCAFXDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730      
909-456 2 ONTRCAFXDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730      
909-456 3 ONTRCAFXDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730      
909-456 4 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2004-12-19   
909-456 5 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2002-12-16   
909-456 6 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2003-11-18   
909-456 7 ONTRCAFXDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730      
909-456 8 ONTRCAFXDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 730      
909-456 9 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2002-12-16   
909-457 A LSANCARC80Z  9262 UTILITY TELECOM GROUP, LLC - CA 730      
909-458 A ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-458 0 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2010-10-31   
909-458 1 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-458 2 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-458 3 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-458 4 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-458 5 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-458 6 ANHMCAHLDS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2009-08-13   
909-458 7 LSANCARC80Z  9262 UTILITY TELECOM GROUP, LLC - CA 730      
909-458 8 LSANCARC80Z  9262 UTILITY TELECOM GROUP, LLC - CA 730      
909-458 9 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-459 A ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-459 0 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-459 1 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-459 2 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-459 3 LSANCARC80Z  9262 UTILITY TELECOM GROUP, LLC - CA 730      
909-459 4 LSANCARC80Z  9262 UTILITY TELECOM GROUP, LLC - CA 730      
909-459 5 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-459 6 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-459 7 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-459 8 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-459 9 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2004-09-26   
909-460 A ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-460 0 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-460 1 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-460 2 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-460 3 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-460 4 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-460 5 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-460 6 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-460 7 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-460 8 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-07-04   
909-460 9 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-467 A ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-467 0 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-467 1 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-467 2 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-467 3 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-467 4 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-467 5 ONTRCAXF98K  2319 FRONTIER CALIFORNIA INC. 730      
909-467 6 ANHMCAHLDS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2010-01-28   
909-467 7 LSANCARC80Z  9262 UTILITY TELECOM GROUP, LLC - CA 730      
909-467 8 ANHMCAHLDS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2003-05-05   
909-467 9 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2003-12-09   
909-472 A SNBRCA01DS1  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
909-472 0 SNBRCA01DS1  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
909-472 1 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2004-03-07   
909-472 2 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2004-03-07   
909-472 3 SNBRCA01DS1  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
909-472 4 SNBRCA01DS1  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
909-472 5 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2003-09-16   
909-472 6 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2005-12-30   
909-472 7 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2003-09-16   
909-472 8 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2002-12-14   
909-472 9 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2005-07-06   
909-489 A RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
909-489 0 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
909-489 1 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
909-489 2 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
909-489 3 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
909-489 4 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
909-489 5 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
909-489 6 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
909-489 7 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
909-489 8 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
909-489 9 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
909-490 A RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730      
909-490 0 ONTRCAXPXBY  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2016-08-17   
909-490 1 RVSDCAYAGT1  899D METROPCS NETWORKS, LLC 730   2016-08-16   
909-490 2 RVSDCAYAGT1  899D METROPCS NETWORKS, LLC 730   2016-08-16   
909-490 3 ONTRCAXPXPY  649C ONVOY, LLC - CA 730   2016-08-16   
909-490 4 ONTRCAXPXPY  649C ONVOY, LLC - CA 730   2016-08-16   
909-490 5 LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2016-08-18   
909-490 6 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2016-10-08   
909-490 7 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2016-10-08   
909-490 8 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2016-08-15   
909-490 9 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2016-08-15   
909-509 A RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
909-509 0 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2006-03-12   
909-509 1 RVSDCALBCM4  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2006-03-12   
909-509 2 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2006-09-13   
909-509 3 HSPRCABB0MD  776C CHARTER FIBERLINK CA-CCO, LLC - CA 730   2006-03-13   
909-509 4 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2006-04-13   
909-509 5 LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2006-04-13   
909-509 6 RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2006-04-21   
909-509 7 LSANCARC80Z  9262 UTILITY TELECOM GROUP, LLC - CA 730   2006-05-01   
909-509 8 BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2006-09-15   

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

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.