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: 818 [Rate centres in NPA 818] [Dial plan for NPA 818]

NXX: 583

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
818-583 A Pasadena: La Cañada DA CA LSANCA03DS7  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
818-583 0 Pasadena: La Cañada DA CA   649C ONVOY, LLC - CA 730   2013-05-03   
818-583 1 Pasadena: La Cañada DA CA   4733 PAETEC COMMUNICATIONS, INC. - CA 730   2002-02-11   
818-583 2 Pasadena: La Cañada DA CA   4129 O1 COMMUNICATIONS, INC. - CA 730   2003-10-13   
818-583 3 Pasadena: La Cañada DA CA   4129 O1 COMMUNICATIONS, INC. - CA 730   2003-10-13   
818-583 4 Pasadena: La Cañada DA CA   7453 US TELEPACIFIC CORP. - CA 730   2006-03-27   
818-583 5 Pasadena: La Cañada DA CA   9262 UTILITY TELECOM GROUP, LLC - CA 730   2006-06-20   
818-583 6 Pasadena: La Cañada DA CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-03-25   
818-583 7 Pasadena: La Cañada DA CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2011-02-19   
818-583 8 Pasadena: La Cañada DA CA   649C ONVOY, LLC - CA 730   2010-03-08   
818-583 9 Pasadena: La Cañada DA CA   7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.