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: 277

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
856-277 A Beaver Brook NJ CMDNNJCEX8Z  637C ONVOY, LLC - NJ 222   2026-05-02   
856-277 0 Beaver Brook NJ CMDNNJCEX8Z  637C ONVOY, LLC - NJ 222   2026-05-02   
856-277 1 Beaver Brook NJ CMDNNJCEX8Z  637C ONVOY, LLC - NJ 222   2026-05-21   
856-277 2 Beaver Brook NJ CMDNNJCE71Z  490J BOOST SUBSCRIBERCO L.L.C. 222   2026-06-07   
856-277 4 Beaver Brook NJ   883K AHOI LLC 222   2026-05-23   
856-277 7 Beaver Brook NJ CMDNNJCE71Z  490J BOOST SUBSCRIBERCO L.L.C. 222   2026-08-25   
856-277 8 Beaver Brook NJ CMDNNJCEX8Z  637C ONVOY, LLC - NJ 222   2026-06-25   
856-277 9 Beaver Brook NJ   637C ONVOY, LLC - NJ 222   2026-07-24   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.