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: 0737 WINN TEL. CO.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
989-866 A Winn MI MNPLMICFDS2  344      
989-866 0 Winn MI   344      
989-866 1 Winn MI   344      
989-866 2 Winn MI   344      
989-866 6 Winn MI   344      
989-866 8 Winn MI   344      
989-866 9 Winn MI   344      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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