Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]

NXX: 364

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-364 A Northport MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-364 0 Northport MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348   2021-12-09   
231-364 1 Northport MI BRSPMI091MD  939H COMMIO, LLC 348   2022-12-01   
231-364 2 Northport MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2022-03-04   
231-364 3 Northport MI GDRPMIBL41Z  506J TWILIO INTERNATIONAL, INC. 348   2021-08-16   
231-364 4 Northport MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-08-15   
231-364 5 Northport MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-08-15   
231-364 6 Northport MI GDRPMIBL36Z  624H ONVOY SPECTRUM, LLC 348   2021-08-16   
231-364 7 Northport MI GDRPMIBL36Z  624H ONVOY SPECTRUM, LLC 348   2021-11-22   
231-364 8 Northport MI GDRPMIBL36Z  624H ONVOY SPECTRUM, LLC 348   2021-11-22   
231-364 9 Northport MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2023-01-05   

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

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