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: 840 [Rate centres in NPA 840] [Dial plan for NPA 840]

NXX: 251

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
840-251 A Redlands CA RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2024-03-24   
840-251 0 Redlands CA ONTRCAXPXPY  649C ONVOY, LLC - CA 730   2024-03-25   
840-251 1 Redlands CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2024-03-25   
840-251 2 Redlands CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2024-03-25   
840-251 3 Redlands CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2024-05-06   
840-251 4 Redlands CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2024-06-06   
840-251 5 Redlands CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2024-07-11   
840-251 6 Redlands CA ONTRCAXPXPY  649C ONVOY, LLC - CA 730   2024-04-26   
840-251 7 Redlands CA RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2024-03-24   
840-251 8 Redlands CA RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2024-03-24   
840-251 9 Redlands CA RVSDCAYAGT1  6529 T-MOBILE USA, INC. 730   2024-03-24   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.