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.

Montgomery, MI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
517-296 A MTGMMIXIRS0  4417 FRONTIER COMMUNICATIONS OF MICHIGAN, INC. 346      
517-296 0 MTGMMIXIRS0  4417 FRONTIER COMMUNICATIONS OF MICHIGAN, INC. 346      
517-296 1 MTGMMIXIRS0  4417 FRONTIER COMMUNICATIONS OF MICHIGAN, INC. 346      
517-296 2 LNNGMIMNX8Z  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 346      
517-296 3 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-296 4 MTGMMIXIRS0  4417 FRONTIER COMMUNICATIONS OF MICHIGAN, INC. 346      
517-296 5 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-296 6 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-296 7 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-296 8   792K CHARTER IP ENABLED SERVICES, LLC 346      
517-296 9 MTGMMIXIRS0  4417 FRONTIER COMMUNICATIONS OF MICHIGAN, INC. 346      
517-370 A LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-370 0   624H ONVOY SPECTRUM, LLC 346      
517-370 2 LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346      
517-792 A MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.