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: 464

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-464 A Freesoil MI FONTMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-464 0 Freesoil MI   817J INTERACTIVE SERVICES NETWORK, INC. 348   2005-09-02   
231-464 1 Freesoil MI   933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 348   2018-12-28   
231-464 2 Freesoil MI   792K CHARTER IP ENABLED SERVICES, LLC 348   2021-06-10   
231-464 3 Freesoil MI   508J CENTURYLINK COMMUNICATIONS, LLC 348   2017-10-04   
231-464 5 Freesoil MI   9323 MICHIGAN BELL TEL CO 348      
231-464 6 Freesoil MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2006-11-08   
231-464 7 Freesoil MI   991E BANDWIDTH.COM CLEC, LLC - MI 348   2021-09-04   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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