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: 385

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-385 A Coral MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-385 0 Coral MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348   2021-09-20   
231-385 1 Coral MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2023-08-12   
231-385 2 Coral MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2023-04-22   
231-385 3 Coral MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2022-03-04   
231-385 5 Coral MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-09-19   
231-385 6 Coral MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-09-19   
231-385 9 Coral MI BRSPMI09DS0  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 348   2023-08-19   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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