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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Hammonton, NJ

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
640-273 A   637C ONVOY, LLC - NJ 220   2025-05-09   
640-273 0   637C ONVOY, LLC - NJ 220   2025-05-09   
640-273 1   732J NUSO, LLC 220   2025-05-12   
640-273 8   637C ONVOY, LLC - NJ 220   2026-02-20   
640-273 9   637C ONVOY, LLC - NJ 220   2026-02-20   

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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