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: 600

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
640-600 A Medford NJ CMDNNJCEX8Z  637C ONVOY, LLC - NJ 222      
640-600 0 Medford NJ   637C ONVOY, LLC - NJ 222   2019-09-19   
640-600 1 Medford NJ   637C ONVOY, LLC - NJ 222   2019-09-19   
640-600 2 Medford NJ   637C ONVOY, LLC - NJ 222   2019-09-19   
640-600 3 Medford NJ   264F PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 222   2020-02-28   
640-600 4 Medford NJ   318J COMCAST IP PHONE, LLC 222   2019-09-23   
640-600 6 Medford NJ   965H FRACTEL, LLC 222   2020-03-12   
640-600 7 Medford NJ   637C ONVOY, LLC - NJ 222   2024-03-02   
640-600 8 Medford NJ   637C ONVOY, LLC - NJ 222   2020-07-05   
640-600 9 Medford NJ   637C ONVOY, LLC - NJ 222   2020-07-05   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.