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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: GRCYNYGC6KD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
516-301 A Nassau Zone 1 NY 7421 AT&T - LOCAL 132      
516-302 A Nassau Zone 2 NY 7421 AT&T - LOCAL 132      
516-507 A Nassau Zone 5 NY 7421 AT&T - LOCAL 132      
516-508 A Nassau Zone 5 NY 7421 AT&T - LOCAL 132      
516-515 A Nassau Zone 5 NY 7421 AT&T - LOCAL 132      
516-714 A Nassau Zone 7 NY 7421 AT&T - LOCAL 132      
516-860 A Nassau Zone 8 NY 7421 AT&T - LOCAL 132      
516-927 A Farmingdale NY 7421 AT&T - LOCAL 132      
631-927 A Farmingdale NY 7421 AT&T - LOCAL 132      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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