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: 296

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-296 A Montgomery MI MTGMMIXIRS0  4417 FRONTIER COMMUNICATIONS OF MICHIGAN, INC. 346      
517-296 0 Montgomery MI MTGMMIXIRS0  4417 FRONTIER COMMUNICATIONS OF MICHIGAN, INC. 346      
517-296 1 Montgomery MI MTGMMIXIRS0  4417 FRONTIER COMMUNICATIONS OF MICHIGAN, INC. 346      
517-296 2 Montgomery MI LNNGMIMNX8Z  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 346   2016-06-16   
517-296 3 Montgomery MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2021-06-18   
517-296 4 Montgomery MI MTGMMIXIRS0  4417 FRONTIER COMMUNICATIONS OF MICHIGAN, INC. 346      
517-296 5 Montgomery MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2021-07-11   
517-296 6 Montgomery MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2018-10-12   
517-296 7 Montgomery MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2022-03-04   
517-296 8 Montgomery MI LNNGMIMN17Z  792K CHARTER IP ENABLED SERVICES, LLC 346   2017-07-08   
517-296 9 Montgomery MI MTGMMIXIRS0  4417 FRONTIER COMMUNICATIONS OF MICHIGAN, INC. 346      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.