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: MONRMIMNDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
734-240 A Monroe MI 9323 AMERITECH MICHIGAN 340      
734-241 A Monroe MI 9323 AMERITECH MICHIGAN 340      
734-242 A Monroe MI 9323 AMERITECH MICHIGAN 340      
734-243 A Monroe MI 9323 AMERITECH MICHIGAN 340      
734-265 3 Monroe MI 9323 AMERITECH MICHIGAN 340   2003-11-14   
734-265 4 Monroe MI 9323 AMERITECH MICHIGAN 340   2003-11-14   
734-265 5 Monroe MI 9323 AMERITECH MICHIGAN 340   2003-11-14   
734-384 A Monroe MI 9323 AMERITECH MICHIGAN 340      
734-384 0 Monroe MI 9323 AMERITECH MICHIGAN 340      
734-384 1 Monroe MI 9323 AMERITECH MICHIGAN 340      
734-384 2 Monroe MI 9323 AMERITECH MICHIGAN 340      
734-384 4 Monroe MI 9323 AMERITECH MICHIGAN 340      
734-384 5 Monroe MI 9323 AMERITECH MICHIGAN 340      
734-384 6 Monroe MI 9323 AMERITECH MICHIGAN 340      
734-384 7 Monroe MI 9323 AMERITECH MICHIGAN 340      
734-384 8 Monroe MI 9323 AMERITECH MICHIGAN 340      
734-384 9 Monroe MI 9323 AMERITECH MICHIGAN 340      
734-457 A Monroe MI 9323 AMERITECH MICHIGAN 340      

Last updated: Tue, 04 May 2021 15:04:27 UTC

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