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: 998

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
840-998 A Highland CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2026-03-02   
840-998 0 Highland CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2026-03-02   
840-998 1 Highland CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2026-03-02   
840-998 2 Highland CA   649C ONVOY, LLC - CA 730   2026-05-30   
840-998 3 Highland CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2026-07-18   
840-998 8 Highland CA   145J TERRA NOVA TELECOM INC. 730   2026-03-28   

Last updated: Sat, 04 Jul 2026 13:07:56 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.