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: 536

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-536 A East Jordan MI EJRDMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-536 0 East Jordan MI   9323 MICHIGAN BELL TEL CO 348      
231-536 1 East Jordan MI   9323 MICHIGAN BELL TEL CO 348      
231-536 2 East Jordan MI   9323 MICHIGAN BELL TEL CO 348      
231-536 3 East Jordan MI   9323 MICHIGAN BELL TEL CO 348      
231-536 4 East Jordan MI   9323 MICHIGAN BELL TEL CO 348      
231-536 5 East Jordan MI   516C AT&T CORP. 348   2011-08-23   
231-536 6 East Jordan MI   2550 123.NET, LLC 348   2012-05-28   
231-536 7 East Jordan MI   9323 MICHIGAN BELL TEL CO 348      
231-536 8 East Jordan MI   543C ONVOY, LLCV - MI 348   2013-04-01   
231-536 9 East Jordan MI   9323 MICHIGAN BELL TEL CO 348      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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