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NPA: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-821 8 Holton MI   508J CENTURYLINK COMMUNICATIONS, LLC 348   2015-09-15   
231-821 9 Holton MI   0695 FRONTIER NORTH, INC. - MI 348      
231-822 A Beulah MI   817J INTERACTIVE SERVICES NETWORK, INC. 348      
231-823 A Stanwood MI STWDMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-823 2 Stanwood MI   0695 FRONTIER NORTH, INC. - MI 348      
231-823 4 Stanwood MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2009-09-26   
231-823 5 Stanwood MI   3535 ACD TELECOM, INC. - MI 348   2005-02-18   
231-823 7 Stanwood MI   543C ONVOY, LLCV - MI 348   2013-03-18   
231-823 8 Stanwood MI   0695 FRONTIER NORTH, INC. - MI 348      
231-823 9 Stanwood MI   0695 FRONTIER NORTH, INC. - MI 348      
231-824 A Manton MI MNTNMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-824 0 Manton MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2004-11-12   
231-824 1 Manton MI   3535 ACD TELECOM, INC. - MI 348   2005-02-17   
231-824 2 Manton MI   829J PAETEC ITEL, LLC 348   2006-01-12   
231-824 3 Manton MI   9323 MICHIGAN BELL TEL CO 348      
231-824 4 Manton MI   792K CHARTER IP ENABLED SERVICES, LLC 348   2007-02-25   
231-824 5 Manton MI   817J INTERACTIVE SERVICES NETWORK, INC. 348   2005-09-02   
231-824 6 Manton MI   9323 MICHIGAN BELL TEL CO 348      
231-824 7 Manton MI   543C ONVOY, LLCV - MI 348   2012-06-01   
231-824 8 Manton MI   829J PAETEC ITEL, LLC 348   2004-02-10   
231-824 9 Manton MI   9323 MICHIGAN BELL TEL CO 348      
231-825 A McBain MI MCBNMIMNRS1  9323 MICHIGAN BELL TEL CO 348      
231-825 0 McBain MI   9323 MICHIGAN BELL TEL CO 348      
231-825 1 McBain MI   829J PAETEC ITEL, LLC 348   2004-02-10   
231-825 2 McBain MI   9323 MICHIGAN BELL TEL CO 348      
231-825 3 McBain MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2004-11-12   
231-825 4 McBain MI   9323 MICHIGAN BELL TEL CO 348      
231-825 6 McBain MI   516C AT&T CORP. 348   2011-08-23   
231-825 7 McBain MI   3535 ACD TELECOM, INC. - MI 348   2005-02-17   
231-825 8 McBain MI   9323 MICHIGAN BELL TEL CO 348      
231-825 9 McBain MI   543C ONVOY, LLCV - MI 348   2012-06-01   
231-826 A Falmouth MI FLMOMIXIDS0  0705 BRIGHTSPEED OF NORTHERN MICHIGAN, INC 348      
231-826 0 Falmouth MI   0705 BRIGHTSPEED OF NORTHERN MICHIGAN, INC 348      
231-826 1 Falmouth MI   0705 BRIGHTSPEED OF NORTHERN MICHIGAN, INC 348      
231-826 2 Falmouth MI   0705 BRIGHTSPEED OF NORTHERN MICHIGAN, INC 348      
231-826 3 Falmouth MI   0705 BRIGHTSPEED OF NORTHERN MICHIGAN, INC 348      
231-826 4 Falmouth MI   0705 BRIGHTSPEED OF NORTHERN MICHIGAN, INC 348      
231-826 5 Falmouth MI   0705 BRIGHTSPEED OF NORTHERN MICHIGAN, INC 348      
231-826 6 Falmouth MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2015-10-18   
231-826 7 Falmouth MI   0705 BRIGHTSPEED OF NORTHERN MICHIGAN, INC 348      
231-826 8 Falmouth MI   0705 BRIGHTSPEED OF NORTHERN MICHIGAN, INC 348      
231-826 9 Falmouth MI   0705 BRIGHTSPEED OF NORTHERN MICHIGAN, INC 348      
231-828 A Twin Lake MI TNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-828 0 Twin Lake MI   792K CHARTER IP ENABLED SERVICES, LLC 348   2007-02-25   
231-828 1 Twin Lake MI   543C ONVOY, LLCV - MI 348   2014-10-28   
231-828 2 Twin Lake MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2004-11-13   
231-828 3 Twin Lake MI   3535 ACD TELECOM, INC. - MI 348   2005-02-18   
231-828 4 Twin Lake MI   0695 FRONTIER NORTH, INC. - MI 348      
231-828 5 Twin Lake MI   0695 FRONTIER NORTH, INC. - MI 348      
231-828 6 Twin Lake MI   0695 FRONTIER NORTH, INC. - MI 348      

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

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