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: 604

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
818-604 A San Fernando: San Fernando DA CA   516C AT&T CORP. 730   2026-01-06   
818-604 7 San Fernando: San Fernando DA CA   516C AT&T CORP. 730   2026-01-06   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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