Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 906 [Rate centres in NPA 906] [Dial plan for NPA 906]

NXX: 428

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
906-428 A Gladstone MI GLDSMIGERSA  9323 MICHIGAN BELL TEL CO 342      
906-428 1 Gladstone MI   9323 MICHIGAN BELL TEL CO 342      
906-428 2 Gladstone MI   9323 MICHIGAN BELL TEL CO 342      
906-428 3 Gladstone MI   9323 MICHIGAN BELL TEL CO 342      
906-428 4 Gladstone MI   9323 MICHIGAN BELL TEL CO 342      
906-428 5 Gladstone MI   9323 MICHIGAN BELL TEL CO 342      
906-428 6 Gladstone MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 342   2006-05-31   
906-428 8 Gladstone MI   543C ONVOY, LLCV - MI 342   2019-01-25   
906-428 9 Gladstone MI   9323 MICHIGAN BELL TEL CO 342      

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

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