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: 297

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-297 A Kingsley MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-297 0 Kingsley MI   543C ONVOY, LLCV - MI 348   2023-04-06   
231-297 1 Kingsley MI   624H ONVOY SPECTRUM, LLC 348   2021-12-03   
231-297 3 Kingsley MI   624H ONVOY SPECTRUM, LLC 348   2021-12-03   
231-297 4 Kingsley MI   543C ONVOY, LLCV - MI 348   2022-04-17   
231-297 5 Kingsley MI   543C ONVOY, LLCV - MI 348   2022-12-19   
231-297 6 Kingsley MI   543C ONVOY, LLCV - MI 348   2023-08-12   
231-297 7 Kingsley MI   543C ONVOY, LLCV - MI 348   2021-08-26   
231-297 8 Kingsley MI   543C ONVOY, LLCV - MI 348   2021-08-26   
231-297 9 Kingsley MI   543C ONVOY, LLCV - MI 348   2023-07-08   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.