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

NXX: 297

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
640-297 A New Egypt NJ CMDNNJCEX8Z  637C ONVOY, LLC - NJ 222   2026-02-01   
640-297 0 New Egypt NJ CMDNNJCEX8Z  637C ONVOY, LLC - NJ 222   2026-02-01   
640-297 1 New Egypt NJ CMDNNJCE59Z  6391 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 222   2026-02-02   

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

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