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 BOOST SUBSCRIBERCO L.L.C. 732   2025-12-25   

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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