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: 317

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-317 A Mountain View CA SNFCCA21XEZ  6630 SPOK, INC. 722      

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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