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: ADRNMIXGVMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
517-217 A Clinton MI 3459 TC3 TELECOM, INC. - MI 340      
517-417 A Adrian MI 3459 TC3 TELECOM, INC. - MI 340      
517-470 A Tecumseh MI 3459 TC3 TELECOM, INC. - MI 340      
517-502 A Hudson MI 3459 TC3 TELECOM, INC. - MI 340      
517-504 A Morenci MI 3459 TC3 TELECOM, INC. - MI 340      
517-606 A Blissfield MI 3459 TC3 TELECOM, INC. - MI 340      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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