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: 563

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-563 A Muskegon MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-563 0 Muskegon MI   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 348   2022-05-31   
231-563 1 Muskegon MI   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 348   2022-05-31   
231-563 2 Muskegon MI   543C ONVOY, LLCV - MI 348   2023-07-08   
231-563 3 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2006-06-15   
231-563 4 Muskegon MI   543C ONVOY, LLCV - MI 348   2023-07-08   
231-563 5 Muskegon MI   543C ONVOY, LLCV - MI 348   2023-07-08   
231-563 6 Muskegon MI   318J COMCAST IP PHONE, LLC 348   2008-01-15   
231-563 7 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2023-10-01   
231-563 8 Muskegon MI   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 348   2025-06-23   
231-563 9 Muskegon MI   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 348   2025-06-23   

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

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