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: 404

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-404 A Stanwood MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-404 0 Stanwood MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-404 1 Stanwood MI   792K CHARTER IP ENABLED SERVICES, LLC 348   2013-03-13   
231-404 2 Stanwood MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-03-06   
231-404 3 Stanwood MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-03-06   
231-404 5 Stanwood MI MSKGMIXKFMD  691A DAYSTARR, LLC DBA DAYSTARR COMMUNICATIONS - MI 348   2014-07-15   
231-404 6 Stanwood MI MSKGMIXKQMD  624H ONVOY SPECTRUM, LLC 348   2021-06-20   
231-404 7 Stanwood MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2015-09-19   
231-404 8 Stanwood MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2023-08-06   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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