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.
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OCN: 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
989-768 3 Port Austin MI SGNWMIFAXNX  344   2018-10-26   
989-789 6 Marlette MI SGNWMIFAXNX  344   2017-10-11   
989-795 6 Fostoria MI SGNWMIFAXNX  344   2021-08-09   
989-802 6 Clare MI SGNWMIFAXNX  344   2009-08-24   
989-814 8 Six Lakes MI SGNWMIFAXNX  344   2023-12-26   
989-818 6 Lakeview MI SGNWMIFAXNX  344   2020-11-13   
989-822 6 Barryton MI SGNWMIFAXNX  344   2020-11-13   
989-857 6 Remus MI SGNWMIFAXNX  344   2020-11-14   
989-884 6 Alpena MI SGNWMIFAXNX  344   2013-05-15   
989-889 7 Grayling MI SGNWMIFAXNX  344   2013-08-06   
989-898 6 Midland MI SGNWMIFAXNX  344   2018-07-23   
989-917 6 Minden City MI SGNWMIFAXNX  344   2016-03-18   
989-934 1 Rose City MI SGNWMIFAXNX  344   2020-03-25   
989-963 6 Elkton MI SGNWMIFAXNX  344   2023-12-26   

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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