Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 858 [Rate centres in NPA 858] [Dial plan for NPA 858]

NXX: 446

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
858-446 A San Diego: San Diego DA CA SNDLCAWYAMD  0051 SHELCOMM 732   2026-07-04   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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