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: 274

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
640-274 A Princeton NJ   637C ONVOY, LLC - NJ 222   2025-06-06   
640-274 0 Princeton NJ   637C ONVOY, LLC - NJ 222   2025-06-06   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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