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.

Claremont-San Dimas, CA

1 2 3 4 5 6 7 8 9 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
840-205 A LNBHCAXPXQX  981E BANDWIDTH.COM CLEC, LLC - CA 730      
840-205 0   981E BANDWIDTH.COM CLEC, LLC - CA 730   2021-12-27   
840-205 1   981E BANDWIDTH.COM CLEC, LLC - CA 730   2021-12-27   
840-205 2   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2021-12-28   
840-205 3   981E BANDWIDTH.COM CLEC, LLC - CA 730   2022-03-19   
840-205 4   981E BANDWIDTH.COM CLEC, LLC - CA 730   2022-03-19   
840-205 5   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2022-03-14   
840-205 6   6529 T-MOBILE USA, INC. 730   2022-02-05   
840-205 7   6529 T-MOBILE USA, INC. 730   2022-02-05   
840-205 8   649C ONVOY, LLC - CA 730   2022-12-12   
840-205 9   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-12-28   
840-208 A LNBHCAXPXQX  981E BANDWIDTH.COM CLEC, LLC - CA 730      
840-208 0   981E BANDWIDTH.COM CLEC, LLC - CA 730   2022-04-23   
840-208 1   981E BANDWIDTH.COM CLEC, LLC - CA 730   2022-04-23   
840-208 2   981E BANDWIDTH.COM CLEC, LLC - CA 730   2022-04-23   
840-208 3   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-07-09   
840-208 4   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-10-21   
840-208 5   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-11-21   
840-208 6   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-12-20   
840-208 7   073H TELNYX LLC 730   2022-09-04   
840-208 8   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-04-24   
840-208 9   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-04-24   
840-229 A BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
840-229 0   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-06-02   
840-229 1   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-06-02   
840-229 2   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-06-02   
840-229 3   649C ONVOY, LLC - CA 730   2023-10-16   
840-229 4   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-06-02   
840-229 5   649C ONVOY, LLC - CA 730   2023-10-16   
840-229 6   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-09-26   
840-229 7   649C ONVOY, LLC - CA 730   2023-10-30   
840-229 8   939H COMMIO, LLC 730   2024-01-30   
840-229 9   939H COMMIO, LLC 730   2024-01-30   
840-236 A COVNCAXFX3Y  649C ONVOY, LLC - CA 730      
840-236 0   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-11-25   
840-236 1   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-12-10   
840-236 2   649C ONVOY, LLC - CA 730   2023-11-20   
840-236 3   649C ONVOY, LLC - CA 730   2023-11-20   
840-236 4   649C ONVOY, LLC - CA 730   2023-11-21   
840-236 5   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-09-26   
840-236 6   649C ONVOY, LLC - CA 730   2024-02-24   
840-236 7   649C ONVOY, LLC - CA 730   2024-02-24   
840-236 8   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-12-20   
840-236 9   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2024-02-16   
840-277 A   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-05-12   
840-277 0   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2026-01-23   
840-277 1   624H ONVOY SPECTRUM, LLC 730   2025-05-16   
840-277 2   624H ONVOY SPECTRUM, LLC 730   2025-05-16   
840-277 3   624H ONVOY SPECTRUM, LLC 730   2025-05-16   
840-277 4   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-12-19   

1 2 3 4 5 6 7 8 9 >>

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.