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: 380

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-380 A Newaygo MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-380 0 Newaygo MI   145J TERRA NOVA TELECOM INC. 348   2024-02-14   
231-380 1 Newaygo MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2023-08-12   
231-380 3 Newaygo MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2022-04-17   
231-380 8 Newaygo MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2022-02-24   
231-380 9 Newaygo MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2022-02-24   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.