Local Calling Guide

Area code/prefix search

Search by area code/prefix (NPA/NXX) or OCN

  • 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.

Last updated: Sat, 26 Jul 2014 03:21:21 UTC

How to use this page

NPA: 920 [Rate centres in NPA 920] [Dial plan for NPA 920]

NXX: 494

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA Eff date Disc date Map
920-494 A Green Bay WI GNBYWI11DSA 9327 AMERITECH WISCONSIN [link] 350 map



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