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: WRLKMIMNDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
734-449 A Whitmore Lake MI 9323 MICHIGAN BELL TEL CO 340      
734-449 0 Whitmore Lake MI 9323 MICHIGAN BELL TEL CO 340      
734-449 1 Whitmore Lake MI 9323 MICHIGAN BELL TEL CO 340      
734-449 2 Whitmore Lake MI 9323 MICHIGAN BELL TEL CO 340      
734-449 3 Whitmore Lake MI 9323 MICHIGAN BELL TEL CO 340      
734-449 4 Whitmore Lake MI 9323 MICHIGAN BELL TEL CO 340      
734-449 5 Whitmore Lake MI 9323 MICHIGAN BELL TEL CO 340      
734-449 7 Whitmore Lake MI 9323 MICHIGAN BELL TEL CO 340      
734-449 8 Whitmore Lake MI 9323 MICHIGAN BELL TEL CO 340      
734-449 9 Whitmore Lake MI 9323 MICHIGAN BELL TEL CO 340      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.