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: 544

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-544 A Central Lake MI CNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-544 0 Central Lake MI GDRPMIBLXTZ  3535 ACD TELECOM, INC. - MI 348   2004-10-23   
231-544 1 Central Lake MI ANTSMIADPS0  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 348   2007-02-25   
231-544 2 Central Lake MI CNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-544 3 Central Lake MI CNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-544 4 Central Lake MI CNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-544 5 Central Lake MI CNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-544 6 Central Lake MI CNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-544 7 Central Lake MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2004-07-16   
231-544 8 Central Lake MI CNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-544 9 Central Lake MI CNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      

Last updated: Tue, 04 May 2021 15:04:27 UTC

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