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: 815

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
858-815 A Rancho Bernardo CA SNDGCA023KD  7379 MATRIX TELECOM, LLC. S/I/I TNCI - CA 732      
858-815 0 Rancho Bernardo CA   6529 T-MOBILE USA, INC. 732   2020-12-24   
858-815 1 Rancho Bernardo CA   981E BANDWIDTH.COM CLEC, LLC - CA 732      
858-815 2 Rancho Bernardo CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 732      
858-815 3 Rancho Bernardo CA   6529 T-MOBILE USA, INC. 732   2020-12-24   
858-815 4 Rancho Bernardo CA   649C ONVOY, LLC - CA 732      
858-815 5 Rancho Bernardo CA   981E BANDWIDTH.COM CLEC, LLC - CA 732      
858-815 6 Rancho Bernardo CA   197D VONAGE AMERICA LLC 732      
858-815 7 Rancho Bernardo CA   649C ONVOY, LLC - CA 732      
858-815 8 Rancho Bernardo CA   9262 UTILITY TELECOM GROUP, LLC - CA 732      
858-815 9 Rancho Bernardo CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 732   2011-04-24   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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