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, 13 Dec 2014 19:13:09 UTC

How to use this page

NPA: 506 [Rate centres in NPA 506] [Dial plan for NPA 506]

NXX: 401

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA Eff date Disc date Map
506-401 A Clair NB CLARNBSCAMD 329A ALIANT TELECOM (MOBILITY) [link] 888 map



Sponsored by: Callcentric - VoIP Internet phone service