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]

NXX: 522

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-522 A Grass Lake MI GRLKMIXGDS0  0695 FRONTIER NORTH, INC. - MI 346      
517-522 0 Grass Lake MI LNNGMIDCHMD  4632 TELNET WORLDWIDE, INC. 346   2005-09-03   
517-522 1 Grass Lake MI LNNGMIMNX8Z  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 346   2016-03-21   
517-522 2 Grass Lake MI LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346   2009-12-07   
517-522 3 Grass Lake MI GRLKMIXGDS0  0695 FRONTIER NORTH, INC. - MI 346      
517-522 4 Grass Lake MI GRLKMIXGDS0  0695 FRONTIER NORTH, INC. - MI 346      
517-522 5 Grass Lake MI GRLKMIXGDS0  0695 FRONTIER NORTH, INC. - MI 346      
517-522 6 Grass Lake MI GRLKMIXGDS0  0695 FRONTIER NORTH, INC. - MI 346      
517-522 7 Grass Lake MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2007-03-05   
517-522 8 Grass Lake MI GRLKMIXGDS0  0695 FRONTIER NORTH, INC. - MI 346      
517-522 9 Grass Lake MI LNNGMIMNX3Y  2550 123.NET, INC. 346   2017-04-03   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.