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: 442 [Rate centres in NPA 442] [Dial plan for NPA 442]

NXX: 410

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
442-410 A Kernville CA VTVLCAXAX5Y  649C ONVOY, LLC - CA 730   2024-01-23   
442-410 3 Kernville CA VTVLCAXAX5Y  649C ONVOY, LLC - CA 730   2023-08-26   
442-410 4 Kernville CA   624H ONVOY SPECTRUM, LLC 730   2025-01-30   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.