Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 408 [Rate centres in NPA 408] [Dial plan for NPA 408]

NXX: 538

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
408-538 A San Jose: West DA CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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