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: 683

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
858-683 A Rancho Bernardo CA SNDGCA023KD  7379 MATRIX TELECOM, LLC. S/I/I TNCI - CA 732      
858-683 0 Rancho Bernardo CA SNDGCAJWDS0  649C ONVOY, LLC - CA 732      
858-683 1 Rancho Bernardo CA SNDGCAJWDS0  649C ONVOY, LLC - CA 732      
858-683 2 Rancho Bernardo CA SNDGCAJWDS0  649C ONVOY, LLC - CA 732      
858-683 3 Rancho Bernardo CA SNDGCA02XIZ  981E BANDWIDTH.COM CLEC, LLC - CA 732   2008-11-22   
858-683 4 Rancho Bernardo CA ESCNCAKY2MD  6529 T-MOBILE USA, INC. 732   2018-08-23   
858-683 5 Rancho Bernardo CA ESCNCAKY2MD  6529 T-MOBILE USA, INC. 732   2020-11-13   
858-683 6 Rancho Bernardo CA SNDGCAJWDS0  649C ONVOY, LLC - CA 732   2011-09-28   
858-683 7 Rancho Bernardo CA SNDGCAJWDS0  649C ONVOY, LLC - CA 732   2008-05-29   
858-683 8 Rancho Bernardo CA SNDACAGLDS2  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 732   2012-11-10   
858-683 9 Rancho Bernardo CA SNDGCA51CM3  6010 NEW CINGULAR WIRELESS PCS, LLC 732   2014-09-11   

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

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