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.

Switch: SGNWMIFAXNX

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
989-857 6 Remus MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 344   2020-11-14   
989-884 6 Alpena MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 344   2013-05-15   
989-889 7 Grayling MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 344   2013-08-06   
989-898 6 Midland MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 344   2018-07-23   
989-917 6 Minden City MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 344   2016-03-18   
989-934 1 Rose City MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 344   2020-03-25   

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Last updated: Sat, 02 May 2026 12:20:53 UTC

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