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: 230

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
350-230 A Modesto CA SKTNCAGSGT0  6010 NEW CINGULAR WIRELESS PCS, LLC 738   2024-10-21   
350-230 0 Modesto CA SKTNCASL5MD  732J NUSO, LLC 738   2024-10-22   
350-230 1 Modesto CA SKTNCASL5MD  732J NUSO, LLC 738   2024-10-22   
350-230 7 Modesto CA SKTNCAGSGT0  6010 NEW CINGULAR WIRELESS PCS, LLC 738   2024-12-23   
350-230 8 Modesto CA SKTNCASL5MD  732J NUSO, LLC 738   2024-10-22   
350-230 9 Modesto CA SKTNCAGSGT0  6010 NEW CINGULAR WIRELESS PCS, LLC 738   2024-10-21   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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