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: 400

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
840-400 A Ontario CA LSANCAJWIMD  965H FRACTEL, LLC 730      
840-400 0 Ontario CA LSANCAJWIMD  965H FRACTEL, LLC 730   2021-03-06   
840-400 1 Ontario CA ONTRCAXPXPY  649C ONVOY, LLC - CA 730   2021-07-30   
840-400 2 Ontario CA ONTRCAXPXPY  649C ONVOY, LLC - CA 730   2021-07-30   
840-400 3 Ontario CA ONTRCAXPXPY  649C ONVOY, LLC - CA 730   2021-07-30   
840-400 4 Ontario CA ONTRCAXPXPY  649C ONVOY, LLC - CA 730   2023-02-05   
840-400 5 Ontario CA ONTRCAXPXPY  649C ONVOY, LLC - CA 730   2021-07-30   
840-400 6 Ontario CA ONTRCAXPXPY  649C ONVOY, LLC - CA 730   2021-10-03   
840-400 7 Ontario CA ONTRCAXPXPY  649C ONVOY, LLC - CA 730   2021-10-03   
840-400 8 Ontario CA ONTRCAXPXPY  649C ONVOY, LLC - CA 730   2021-10-03   
840-400 9 Ontario CA ONTRCAXPXPY  649C ONVOY, LLC - CA 730   2022-12-15   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.