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.
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Switch: DMDLMIDDRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
517-322 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-636 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-646 A Dimondale MI 9323 MICHIGAN BELL TEL CO 346      
517-646 0 Dimondale MI 9323 MICHIGAN BELL TEL CO 346      
517-646 2 Dimondale MI 9323 MICHIGAN BELL TEL CO 346      
517-646 3 Dimondale MI 9323 MICHIGAN BELL TEL CO 346      
517-646 5 Dimondale MI 9323 MICHIGAN BELL TEL CO 346      
517-646 6 Dimondale MI 9323 MICHIGAN BELL TEL CO 346      
517-646 7 Dimondale MI 9323 MICHIGAN BELL TEL CO 346      
517-646 8 Dimondale MI 9323 MICHIGAN BELL TEL CO 346      
517-646 9 Dimondale MI 9323 MICHIGAN BELL TEL CO 346      
517-721 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-721 2 Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-721 3 Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-721 4 Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-721 8 Lansing MI 9323 MICHIGAN BELL TEL CO 346      

Last updated: Fri, 10 Jul 2026 02:55:48 UTC

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