Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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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   637C ONVOY, LLC - NJ 222   2026-07-12   
640-301 0 Ewing NJ   637C ONVOY, LLC - NJ 222   2026-07-12   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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