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: 644

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
640-644 A Medford NJ CMDNNJCE51Z  624H ONVOY SPECTRUM, LLC 222      
640-644 0 Medford NJ   637C ONVOY, LLC - NJ 222   2024-03-02   
640-644 1 Medford NJ   637C ONVOY, LLC - NJ 222   2024-04-05   
640-644 2 Medford NJ   637C ONVOY, LLC - NJ 222   2024-04-05   
640-644 3 Medford NJ   264F PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 222   2024-09-28   
640-644 4 Medford NJ   624H ONVOY SPECTRUM, LLC 222   2022-01-29   
640-644 5 Medford NJ   624H ONVOY SPECTRUM, LLC 222   2022-01-29   
640-644 6 Medford NJ   624H ONVOY SPECTRUM, LLC 222   2021-06-06   
640-644 7 Medford NJ   637C ONVOY, LLC - NJ 222   2022-11-27   
640-644 8 Medford NJ   637C ONVOY, LLC - NJ 222   2022-11-27   
640-644 9 Medford NJ   637C ONVOY, LLC - NJ 222   2022-11-27   

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

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