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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Switch: SGNWMIFAXAY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
989-372 8 Saginaw MI 156J RCLEC, INC. 344   2015-12-17   
989-771 6 Saginaw MI 156J RCLEC, INC. 344   2017-03-02   
989-930 A Saginaw MI 156J RCLEC, INC. 344      
989-930 4 Saginaw MI 156J RCLEC, INC. 344   2014-09-25   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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