Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Gustine, CA

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
350-999 8 SKTNCACZDS2  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 738   2022-12-05   
350-999 9   145J TERRA NOVA TELECOM INC. 738   2022-12-04   

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Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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