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
517-222 1 Dansville MI 145J TERRA NOVA TELECOM INC. 346   2026-02-06   
517-283 9 Reading MI 145J TERRA NOVA TELECOM INC. 346   2026-03-29   
517-568 2 Homer MI 145J TERRA NOVA TELECOM INC. 346   2026-06-04   
517-625 9 Perry MI 145J TERRA NOVA TELECOM INC. 346   2026-03-29   
517-686 1 Albion MI 145J TERRA NOVA TELECOM INC. 346   2026-03-15   
517-849 3 Jonesville MI 145J TERRA NOVA TELECOM INC. 346   2026-03-15   
517-855 A Lansing MI 145J TERRA NOVA TELECOM INC. 346      
517-910 0 Onondaga MI 145J TERRA NOVA TELECOM INC. 346   2026-03-29   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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