Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

OCN: 516C AT&T CORP.

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
989-575 A Akron MI SGNWMIATX0X  344      
989-575 7 Akron MI SGNWMIATX0X  344   2010-02-04   
989-625 5 Freeland MI SGNWMIATX0X  344   2011-09-30   
989-630 9 Harrison MI SGNWMIATX0X  344   2011-09-30   
989-660 3 Mayville MI SGNWMIATX0X  344   2011-09-30   
989-674 5 Unionville MI SGNWMIATX0X  344   2011-09-30   
989-704 5 Sebewaing MI SGNWMIATX0X  344   2011-09-30   
989-726 5 West Branch MI SGNWMIATX0X  344   2014-03-07   
989-750 A Midland MI SGNWMIATX0X  344      
989-750 7 Midland MI SGNWMIATX0X  344   2006-06-30   
989-776 3 Saginaw MI SGNWMIATX0X  344   2016-08-19   
989-850 5 Gagetown MI SGNWMIATX0X  344   2012-01-27   
989-868 5 Reese MI SGNWMIATX0X  344   2011-09-30   

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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