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.

Switch: NADMMIXIDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
517-287 A North Adams MI 4417 FRONTIER COMMUNICATIONS OF MICHIGAN, INC. 346      
517-698 4 North Adams MI 991E BANDWIDTH.COM CLEC, LLC - MI 346   2024-11-09   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.