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: LNNGMIDCCMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
517-268 5 Holt MI 145J TERRA NOVA TELECOM INC. 346   2024-05-27   
517-440 0 Lansing MI 145J TERRA NOVA TELECOM INC. 346   2024-02-14   
517-528 1 Lansing MI 145J TERRA NOVA TELECOM INC. 346   2024-11-18   
517-616 0 Dimondale MI 145J TERRA NOVA TELECOM INC. 346   2025-01-08   
517-797 7 Hillsdale MI 145J TERRA NOVA TELECOM INC. 346   2025-01-08   
517-855 A Lansing MI 145J TERRA NOVA TELECOM INC. 346      

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

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