Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 818 [Rate centres in NPA 818] [Dial plan for NPA 818]

NXX: 477

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
818-477 A Northridge CA SHOKCA02DS2  7421 AT&T - LOCAL 730      
818-477 0 Northridge CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2005-09-17   
818-477 1 Northridge CA   649C ONVOY, LLC - CA 730   2005-09-29   
818-477 2 Northridge CA   516C AT&T CORP. 730   2008-09-10   
818-477 3 Northridge CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2008-11-05   
818-477 4 Northridge CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2004-07-14   
818-477 5 Northridge CA   624H ONVOY SPECTRUM, LLC 730   2021-07-22   
818-477 6 Northridge CA   649C ONVOY, LLC - CA 730   2012-02-17   
818-477 7 Northridge CA   6529 T-MOBILE USA, INC. 730   2005-10-13   
818-477 8 Northridge CA   899D METROPCS NETWORKS, LLC 730   2016-12-31   
818-477 9 Northridge CA   7421 AT&T - LOCAL 730      

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

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