Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 628 [Rate centres in NPA 628] [Dial plan for NPA 628]

NXX: 327

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
628-327 A San Rafael CA   649C ONVOY, LLC - CA 722   2025-10-25   
628-327 0 San Rafael CA   649C ONVOY, LLC - CA 722   2025-10-25   
628-327 1 San Rafael CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2025-11-21   
628-327 2 San Rafael CA   649C ONVOY, LLC - CA 722   2025-11-28   
628-327 9 San Rafael CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2025-11-25   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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