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: 580

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
510-580 A Fremont-Newark: Oliver DA CA FRMTCAEDDS0  7262 XO CALIFORNIA, INC. 722      

Last updated: Sun, 28 Feb 2021 19:06:05 UTC

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