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: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]

NXX: 830

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-830 A Muskegon MI MSKHMIXPDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-830 0 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-830 1 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-830 2 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-830 3 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-830 4 Muskegon MI   6664 SPRINT SPECTRUM L.P. 348   2005-04-15   
231-830 5 Muskegon MI   6664 SPRINT SPECTRUM L.P. 348   2005-07-08   
231-830 6 Muskegon MI   6664 SPRINT SPECTRUM L.P. 348   2005-07-28   
231-830 7 Muskegon MI   6664 SPRINT SPECTRUM L.P. 348   2005-10-01   
231-830 8 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      
231-830 9 Muskegon MI   0695 FRONTIER NORTH, INC. - MI 348      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.