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: 441

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
858-441 A El Cajon CA   649C ONVOY, LLC - CA 732   2025-12-07   
858-441 0 El Cajon CA   649C ONVOY, LLC - CA 732   2025-12-07   
858-441 4 El Cajon CA   490J DISH WIRELESS, LLC 732   2025-12-25   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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