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

NXX: 598

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
856-598 A Elmer NJ CMDNNJCEX1Z  939H COMMIO, LLC 222   2024-03-11   
856-598 0 Elmer NJ CMDNNJCEX1Z  939H COMMIO, LLC 222   2024-03-11   
856-598 1 Elmer NJ   637C ONVOY, LLC - NJ 222   2025-04-13   

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

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