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: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]

NXX: 452

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-452 A Newaygo MI GDRPMIBL40Z  318J COMCAST IP PHONE, LLC 348      
231-452 3 Newaygo MI GDRPMIBL40Z  318J COMCAST IP PHONE, LLC 348   2008-01-23   
231-452 6 Newaygo MI GFTPMIEF1MD  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 348   2007-02-25   

Last updated: Fri, 28 Jun 2024 03:14:50 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.