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.

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
989-778 A Bay City MI SGNWMIPA2MD  344      
989-778 1 Bay City MI SGNWMIPA2MD  344   2013-11-14   
989-778 2 Bay City MI SGNWMIPA2MD  344   2015-11-05   
989-778 3 Bay City MI SGNWMIPA2MD  344   2018-05-22   
989-795 1 Fostoria MI SGNWMIPA2MD  344   2015-03-01   
989-821 1 Higgins Lake MI OWTPMI023MD  344   2007-03-18   
989-822 1 Barryton MI OWTPMI022MD  344   2021-06-10   
989-833 8 Riverdale MI OWTPMI022MD  344   2014-07-30   
989-834 3 Ovid MI OWTPMI023MD  344   2013-09-13   
989-843 1 Mayville MI SGNWMIPA2MD  344   2015-07-05   
989-853 1 Muir MI OWTPMI022MD  344   2007-03-18   
989-863 2 Reese MI SGNWMIPA2MD  344   2007-02-25   
989-865 5 St Charles MI SGNWMIPA2MD  344   2007-02-25   
989-866 3 Winn MI OWTPMI022MD  344   2019-09-20   
989-869 A Twining MI SGNWMIPA2MD  344      
989-869 9 Twining MI SGNWMIPA2MD  344   2017-06-12   
989-871 1 Millington MI SGNWMIPA2MD  344   2015-03-01   
989-873 1 Prescott MI OWTPMI023MD  344   2007-03-18   
989-882 9 Vassar MI SGNWMIPA2MD  344   2007-02-25   
989-886 1 Vickeryville MI OWTPMI022MD  344   2025-07-27   
989-898 7 Midland MI SGNWMIPA2MD  344   2018-08-12   
989-912 2 Cass City MI SGNWMIPA2MD  344   2007-07-20   
989-966 2 Vanderbilt MI OWTPMI022MD  344   2007-03-18   
989-981 7 Hubbardston MI OWTPMI022MD  344   2025-07-13   
989-984 5 East Tawas MI SGNWMIPA2MD  344   2013-02-16   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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