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: ELNSMIMNDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
517-203 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-324 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-332 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-333 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-336 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-337 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-351 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-353 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-355 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-432 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-664 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-884 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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