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: LNNGMINWDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
517-321 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-323 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-327 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-481 7 Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-481 8 Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-481 9 Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-703 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-703 0 Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-703 1 Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-703 2 Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-703 5 Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-703 8 Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-703 9 Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-886 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      

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

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