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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NPA: 640 [Rate centres in NPA 640] [Dial plan for NPA 640]

NXX: 301

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
640-301 A Ewing NJ CMDNNJCEX8Z  637C ONVOY, LLC - NJ 222   2026-07-12   
640-301 0 Ewing NJ CMDNNJCEX8Z  637C ONVOY, LLC - NJ 222   2026-07-12   
640-301 7 Ewing NJ   824J OPENTACT INC. 222   2026-10-24   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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