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: 856 [Rate centres in NPA 856] [Dial plan for NPA 856]

NXX: 666

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
856-666 A Paulsboro NJ CMDNNJCEX8Z  637C ONVOY, LLC - NJ 222      
856-666 0 Paulsboro NJ   637C ONVOY, LLC - NJ 222   2015-07-30   
856-666 1 Paulsboro NJ   118F BANDWIDTH.COM CLEC, LLC - NJ 222   2015-11-07   
856-666 2 Paulsboro NJ   637C ONVOY, LLC - NJ 222   2016-04-29   
856-666 3 Paulsboro NJ   637C ONVOY, LLC - NJ 222   2016-04-29   
856-666 4 Paulsboro NJ   318J COMCAST IP PHONE, LLC 222   2017-07-17   
856-666 5 Paulsboro NJ   482F CORETEL NEW JERSEY, INC. - NJ 222   2019-04-17   
856-666 6 Paulsboro NJ   637C ONVOY, LLC - NJ 222   2014-05-25   
856-666 7 Paulsboro NJ   637C ONVOY, LLC - NJ 222   2016-03-14   
856-666 8 Paulsboro NJ   637C ONVOY, LLC - NJ 222   2016-03-14   
856-666 9 Paulsboro NJ   073H TELNYX LLC 222   2017-04-24   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.