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.

NPA: 517 [Rate centres in NPA 517] [Dial plan for NPA 517]

Block: A

<< 1 2 3 4 5 6 7

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-990 A Jackson MI LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346      
517-991 A Camden MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-992 A Williamston MI LNNGMIMNX3Y  2550 123.NET, LLC 346      
517-993 A Lansing MI LNNGMIMNX8Z  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 346      
517-994 A Portland MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-995 A Jonesville MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-996 A Williamston MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-997 A Charlotte MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-998 A Jackson MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-999 A Lansing MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      

<< 1 2 3 4 5 6 7

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.