Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 510 [Rate centres in NPA 510] [Dial plan for NPA 510]

NXX: 510

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
510-510 A Fremont-Newark: Main DA CA MLPTCAVPAMD  0051 SHELCOMM 722   2024-11-03   

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

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