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: 663

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-663 A Mesick MI BRSPMI097MD  516J TON80 COMMUNICATIONS, LLC 348      
231-663 1 Mesick MI   792K CHARTER IP ENABLED SERVICES, LLC 348   2023-03-12   
231-663 3 Mesick MI BRSPMI097MD  516J TON80 COMMUNICATIONS, LLC 348   2022-05-07   
231-663 7 Mesick MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2022-12-12   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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