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: 639

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-639 A San Mateo CA SNFCCAMKX1X  9748 AMERICAN MESSAGING SERVICES, LLC 722      

Last updated: Sun, 07 Feb 2021 01:52:50 UTC

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