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: 350 [Rate centres in NPA 350] [Dial plan for NPA 350]

NXX: 550

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
350-550 A Moccasin CA SKTNCA01XKZ  624H ONVOY SPECTRUM, LLC 738   2024-01-15   
350-550 0 Moccasin CA SKTNCA01XKZ  624H ONVOY SPECTRUM, LLC 738   2024-01-15   
350-550 5 Moccasin CA SKTNCACZ7MD  145J TERRA NOVA TELECOM INC. 738   2024-02-02   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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