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: 828

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-828 A Twin Lake MI TNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-828 0 Twin Lake MI ANTSMIADPS0  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 348      
231-828 1 Twin Lake MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-828 2 Twin Lake MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348      
231-828 3 Twin Lake MI GDRPMIBLXTZ  3535 ACD TELECOM, INC. - MI 348      
231-828 4 Twin Lake MI TNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-828 5 Twin Lake MI TNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-828 6 Twin Lake MI TNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-828 7 Twin Lake MI GDRPMIBL40Z  318J COMCAST IP PHONE, LLC 348      
231-828 8 Twin Lake MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348      
231-828 9 Twin Lake MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.