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: 805 [Rate centres in NPA 805] [Dial plan for NPA 805]

NXX: 301

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
805-301 A Somis CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
805-301 0 Somis CA   576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2013-08-22   
805-301 1 Somis CA   649C ONVOY, LLC - CA 730   2013-03-27   
805-301 2 Somis CA   649C ONVOY, LLC - CA 730   2016-04-23   
805-301 3 Somis CA   508J CENTURYLINK COMMUNICATIONS, LLC 730   2014-07-04   
805-301 4 Somis CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2013-03-31   
805-301 5 Somis CA   649C ONVOY, LLC - CA 730   2013-03-09   
805-301 6 Somis CA   649C ONVOY, LLC - CA 730   2013-04-05   
805-301 7 Somis CA   649C ONVOY, LLC - CA 730   2013-04-05   
805-301 8 Somis CA   649C ONVOY, LLC - CA 730   2016-02-26   
805-301 9 Somis CA   649C ONVOY, LLC - CA 730   2009-12-17   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.