Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 650 [Rate centres in NPA 650] [Dial plan for NPA 650]

NXX: 543

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-543 A Palo Alto CA SNJSCAYB0MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722      

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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