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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Switch: SNFCCA01GT0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
341-244 1 Oakland: Trinidad DA CA 6010 NEW CINGULAR WIRELESS PCS, LLC 722   2025-11-14   
341-244 4 Oakland: Trinidad DA CA 6010 NEW CINGULAR WIRELESS PCS, LLC 722   2026-04-03   
341-666 2 Oakland: Trinidad DA CA 6010 NEW CINGULAR WIRELESS PCS, LLC 722   2025-04-05   
510-667 2 Oakland: Trinidad DA CA 6010 NEW CINGULAR WIRELESS PCS, LLC 722   2025-04-05   
510-686 5 Oakland: Trinidad DA CA 6010 NEW CINGULAR WIRELESS PCS, LLC 722   2025-04-05   
510-924 1 Oakland: Trinidad DA CA 6010 NEW CINGULAR WIRELESS PCS, LLC 722   2026-04-03   

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

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