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.
NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
917-735 A New York City Zone 04 NY   132   2025-08-29   
917-735 1 New York City Zone 04 NY   132   2025-08-29   

Last updated: Tue, 15 Jul 2025 18:46:49 UTC

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