Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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NPA: 650 [Rate centres in NPA 650] [Dial plan for NPA 650]

NXX: 659

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-659 A San Mateo CA   624H ONVOY SPECTRUM, LLC 722   2025-11-13   
650-659 0 San Mateo CA   649C ONVOY, LLC - CA 722   2025-11-14   
650-659 5 San Mateo CA   624H ONVOY SPECTRUM, LLC 722   2025-11-13   
650-659 6 San Mateo CA   624H ONVOY SPECTRUM, LLC 722   2025-11-13   
650-659 7 San Mateo CA   624H ONVOY SPECTRUM, LLC 722   2025-11-13   
650-659 8 San Mateo CA   624H ONVOY SPECTRUM, LLC 722   2025-11-13   
650-659 9 San Mateo CA   624H ONVOY SPECTRUM, LLC 722   2025-11-13   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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