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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Nassau Zone 6, NY

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
516-999 6 NYCMNYZRX3Y  977K YORKSTREAM COMMUNICATIONS LLC 132   2024-04-22   
516-999 7 NYCMNYZRX3Y  977K YORKSTREAM COMMUNICATIONS LLC 132   2024-04-22   
516-999 8 NYCMNYZRX3Y  977K YORKSTREAM COMMUNICATIONS LLC 132   2024-04-22   
516-999 9 NYCMNYZRX3Y  977K YORKSTREAM COMMUNICATIONS LLC 132   2024-04-22   

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Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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