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: 547

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-547 A Addison MI ADSNMIXIDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-547 0 Addison MI LNNGMIMNX3Y  2550 123.NET, LLC 346   2003-03-09   
517-547 1 Addison MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2021-04-25   
517-547 2 Addison MI LNNGMIMNX8Z  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 346   2016-05-23   
517-547 3 Addison MI ADSNMIXIDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-547 4 Addison MI ADSNMIXIDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-547 5 Addison MI ADSNMIXIDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-547 6 Addison MI ADSNMIXIDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-547 7 Addison MI ADSNMIXIDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-547 8 Addison MI ADSNMIXIDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-547 9 Addison MI ADSNMIXIDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.