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: WBFDMIMNPS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
313-285 A Detroit Zone 1 MI 288E CBEYOND COMMUNICATIONS, LLC - MI 340   2007-05-15   
734-307 A Trenton MI 288E CBEYOND COMMUNICATIONS, LLC - MI 340      
734-648 A Pinckney MI 288E CBEYOND COMMUNICATIONS, LLC - MI 340      
947-282 A Southfield MI 288E CBEYOND COMMUNICATIONS, LLC - MI 340      

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

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