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: MSCKMIXIRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
231-269 A Buckley MI 0704 ACE TEL. CO. OF MICHIGAN, INC. 348      
231-369 A South Boardman MI 0704 ACE TEL. CO. OF MICHIGAN, INC. 348      
231-378 A Copemish Thompsonville MI 0704 ACE TEL. CO. OF MICHIGAN, INC. 348      
231-862 A Hoxeyville MI 0704 ACE TEL. CO. OF MICHIGAN, INC. 348      
231-885 A Mesick MI 0704 ACE TEL. CO. OF MICHIGAN, INC. 348      

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

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