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: 643

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-643 A Morley MI GDRPMIBLX8Z  2550 123.NET, LLC 348      
231-643 0 Morley MI   2550 123.NET, LLC 348      
231-643 1 Morley MI   145J TERRA NOVA TELECOM INC. 348   2025-07-27   
231-643 3 Morley MI   145J TERRA NOVA TELECOM INC. 348   2024-02-12   
231-643 4 Morley MI   145J TERRA NOVA TELECOM INC. 348   2023-06-24   
231-643 6 Morley MI   145J TERRA NOVA TELECOM INC. 348   2024-10-16   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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