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: 449

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-449 A Baldwin MI GFTPMIEF1MD  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 348      
231-449 0 Baldwin MI GFTPMIEF1MD  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 348   2021-06-27   
231-449 1 Baldwin MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2023-08-06   
231-449 2 Baldwin MI GDRPMIBL41Z  506J TWILIO INTERNATIONAL, INC. 348   2021-07-26   
231-449 3 Baldwin MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2022-04-17   
231-449 4 Baldwin MI GDRPMIBL36Z  624H ONVOY SPECTRUM, LLC 348   2021-07-02   
231-449 5 Baldwin MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-08-15   
231-449 6 Baldwin MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-08-15   
231-449 9 Baldwin MI BRSPMI096MD  145J TERRA NOVA TELECOM INC. 348   2023-08-06   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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