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: MNCHMIMNRSA

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
734-428 A Manchester MI 9323 MICHIGAN BELL TEL CO 340      
734-428 0 Manchester MI 9323 MICHIGAN BELL TEL CO 340      
734-428 1 Manchester MI 9323 MICHIGAN BELL TEL CO 340      
734-428 2 Manchester MI 9323 MICHIGAN BELL TEL CO 340      
734-428 4 Manchester MI 9323 MICHIGAN BELL TEL CO 340      
734-428 5 Manchester MI 9323 MICHIGAN BELL TEL CO 340      
734-428 7 Manchester MI 9323 MICHIGAN BELL TEL CO 340      
734-428 8 Manchester MI 9323 MICHIGAN BELL TEL CO 340      
734-428 9 Manchester MI 9323 MICHIGAN BELL TEL CO 340      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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