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: 508

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
530-508 A Dunnigan CA SCRMCA01XSY  649C ONVOY, LLC - CA 726      
530-508 0 Dunnigan CA SCRMCA01XSY  649C ONVOY, LLC - CA 726   2019-02-23   
530-508 1 Dunnigan CA   515J IP HORIZON LLC 726      
530-508 2 Dunnigan CA   515J IP HORIZON LLC 726      
530-508 3 Dunnigan CA SCRMCA01X7Z  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 726   2013-03-28   
530-508 5 Dunnigan CA WSCRCAHW3MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 726   2005-07-26   
530-508 6 Dunnigan CA SCRMCA01XXY  981E BANDWIDTH.COM CLEC, LLC - CA 726   2009-02-24   
530-508 7 Dunnigan CA SCRMCA01XSY  649C ONVOY, LLC - CA 726   2019-02-23   
530-508 8 Dunnigan CA SCRMCA01XSY  649C ONVOY, LLC - CA 726   2013-12-02   
530-508 9 Dunnigan CA SCRMCA01XSY  649C ONVOY, LLC - CA 726   2013-03-11   

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.