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: 820 [Rate centres in NPA 820] [Dial plan for NPA 820]

NXX: 356

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
820-356 A Point Mugu CA LSANCAJWIMD  965H FRACTEL, LLC 730      
820-356 0 Point Mugu CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2021-07-28   
820-356 1 Point Mugu CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2021-07-28   
820-356 2 Point Mugu CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2021-07-28   
820-356 3 Point Mugu CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2021-07-28   
820-356 4 Point Mugu CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2022-12-16   
820-356 5 Point Mugu CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2023-10-30   
820-356 6 Point Mugu CA LSANCAJWJMD  516J TON80 COMMUNICATIONS, LLC 730   2021-10-15   
820-356 7 Point Mugu CA LSANCAJWIMD  965H FRACTEL, LLC 730   2021-05-13   
820-356 8 Point Mugu CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2023-10-30   
820-356 9 Point Mugu CA LSANCAJWIMD  965H FRACTEL, LLC 730   2021-03-14   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.