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: 256

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-256 A Lake Leelanau MI LKLLMIMNRSA  9323 AMERITECH MICHIGAN 348      
231-256 0 Lake Leelanau MI   9323 AMERITECH MICHIGAN 348      
231-256 1 Lake Leelanau MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2004-11-12   
231-256 2 Lake Leelanau MI   9323 AMERITECH MICHIGAN 348      
231-256 3 Lake Leelanau MI   0975 LONG DISTANCE OF MICHIGAN, INC. DBA LDMI - MI 348   2004-02-03   
231-256 4 Lake Leelanau MI   279B CLEAR RATE COMMUNICATIONS - CLEC - MI 348   2013-03-07   
231-256 5 Lake Leelanau MI   770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 348   2013-08-06   
231-256 6 Lake Leelanau MI   7575 CENTURYLINK COMMUNICATIONS LLC 348   2015-09-15   
231-256 7 Lake Leelanau MI   9323 AMERITECH MICHIGAN 348      
231-256 8 Lake Leelanau MI   9323 AMERITECH MICHIGAN 348      
231-256 9 Lake Leelanau MI   9323 AMERITECH MICHIGAN 348      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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