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.

NPA: 951 [Rate centres in NPA 951] [Dial plan for NPA 951]

NXX: 576

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
951-576 A Woodcrest CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
951-576 0 Woodcrest CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2021-06-07   
951-576 1 Woodcrest CA   649C ONVOY, LLC - CA 730   2021-07-30   
951-576 2 Woodcrest CA   649C ONVOY, LLC - CA 730   2021-07-30   
951-576 3 Woodcrest CA   649C ONVOY, LLC - CA 730   2021-07-30   
951-576 4 Woodcrest CA   649C ONVOY, LLC - CA 730   2021-07-30   
951-576 5 Woodcrest CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2021-10-28   
951-576 6 Woodcrest CA   073H TELNYX LLC 730   2021-11-07   
951-576 7 Woodcrest CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-06-07   
951-576 8 Woodcrest CA   6529 T-MOBILE USA, INC. 730   2021-06-06   
951-576 9 Woodcrest CA   6529 T-MOBILE USA, INC. 730   2021-06-06   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.