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: 530 [Rate centres in NPA 530] [Dial plan for NPA 530]

NXX: 735

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
530-735 A Knights Landing CA KNLDCAXFDS0  4420 FRONTIER CALIFORNIA INC. 726      
530-735 0 Knights Landing CA   624H ONVOY SPECTRUM, LLC 726   2023-12-29   
530-735 1 Knights Landing CA   145J TERRA NOVA TELECOM INC. 726   2025-04-08   
530-735 2 Knights Landing CA   649C ONVOY, LLC - CA 726   2013-11-29   
530-735 3 Knights Landing CA   649C ONVOY, LLC - CA 726   2013-11-29   
530-735 5 Knights Landing CA   649C ONVOY, LLC - CA 726   2013-03-11   
530-735 6 Knights Landing CA   4420 FRONTIER CALIFORNIA INC. 726      
530-735 7 Knights Landing CA   649C ONVOY, LLC - CA 726   2010-07-19   
530-735 8 Knights Landing CA   649C ONVOY, LLC - CA 726   2011-08-09   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.