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: 742

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
442-742 A Summit Valley CA VTVLCAXAX5Y  649C ONVOY, LLC - CA 730      
442-742 0 Summit Valley CA VTVLCAXAX5Y  649C ONVOY, LLC - CA 730   2021-08-09   
442-742 1 Summit Valley CA VTVLCAXAX5Y  649C ONVOY, LLC - CA 730   2021-08-09   
442-742 2 Summit Valley CA VTVLCAXAX5Y  649C ONVOY, LLC - CA 730   2020-12-14   
442-742 3 Summit Valley CA VTVLCAXAX5Y  649C ONVOY, LLC - CA 730   2020-12-14   
442-742 4 Summit Valley CA VTVLCAXAX5Y  649C ONVOY, LLC - CA 730   2020-12-14   
442-742 5 Summit Valley CA   624H ONVOY SPECTRUM, LLC 730   2025-01-30   
442-742 6 Summit Valley CA LSANCAJWJMD  516J TON80 COMMUNICATIONS, LLC 730   2021-06-08   
442-742 9 Summit Valley CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2021-05-30   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.