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: BBISMIXIPS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
231-634 A Bois Blanc MI 0677 ISLAND TEL. CO. 348      
231-634 0 Bois Blanc MI 0677 ISLAND TEL. CO. 348      
231-634 3 Bois Blanc MI 0677 ISLAND TEL. CO. 348      
231-634 4 Bois Blanc MI 0677 ISLAND TEL. CO. 348      
231-634 5 Bois Blanc MI 0677 ISLAND TEL. CO. 348      
231-634 7 Bois Blanc MI 0677 ISLAND TEL. CO. 348      
231-634 9 Bois Blanc MI 0677 ISLAND TEL. CO. 348      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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