Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]

NXX: 412

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-412 A Harbor Springs MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348      
231-412 0 Harbor Springs MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348   2010-12-09   
231-412 1 Harbor Springs MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2012-12-30   
231-412 2 Harbor Springs MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348   2011-05-01   
231-412 3 Harbor Springs MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2012-06-01   
231-412 4 Harbor Springs MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2013-03-18   
231-412 5 Harbor Springs MI GDRPMIBL15Z  516C AT&T CORP. 348   2011-08-23   
231-412 6 Harbor Springs MI GFTPMIEF1MD  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 348   2013-07-01   
231-412 7 Harbor Springs MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348   2015-03-07   
231-412 8 Harbor Springs MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2016-04-15   
231-412 9 Harbor Springs MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2016-04-15   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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