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: 270

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-270 A Boyne City MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-270 0 Boyne City MI   145J TERRA NOVA TELECOM INC. 348   2024-02-14   
231-270 1 Boyne City MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2022-12-29   
231-270 2 Boyne City MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2022-03-04   
231-270 3 Boyne City MI GDRPMIBL41Z  506J TWILIO INTERNATIONAL, INC. 348   2021-07-26   
231-270 4 Boyne City MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-09-10   
231-270 5 Boyne City MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-09-10   
231-270 6 Boyne City MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-12-13   
231-270 7 Boyne City MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-07-24   
231-270 8 Boyne City MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-07-24   
231-270 9 Boyne City MI BRSPMI09DS0  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 348   2021-12-02   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.