Local Calling Guide

Area code/prefix search

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

NXX: 535

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-535 A Walloon Lake MI WNLKMIWLRS1  9323 MICHIGAN BELL TEL CO 348      
231-535 0 Walloon Lake MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2004-11-14   
231-535 1 Walloon Lake MI GDRPMIBLXTZ  3535 ACD TELECOM, INC. - MI 348   2005-02-18   
231-535 2 Walloon Lake MI WNLKMIWLRS1  9323 MICHIGAN BELL TEL CO 348      
231-535 3 Walloon Lake MI GDRPMIBL41Z  506J TWILIO INTERNATIONAL, INC. 348   2021-07-26   
231-535 4 Walloon Lake MI GDRPMIBQ1MD  4632 TELNET WORLDWIDE, INC. 348   2005-09-02   
231-535 6 Walloon Lake MI GFTPMIEF1MD  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 348   2007-02-25   
231-535 7 Walloon Lake MI GDRPMIBL15Z  516C AT&T CORP. 348   2011-08-23   
231-535 8 Walloon Lake MI GDRPMIBL54Z  0975 LONG DISTANCE OF MICHIGAN, INC. DBA LDMI - MI 348   2004-02-12   
231-535 9 Walloon Lake MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2012-06-01   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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