Local Calling Guide

Area code/prefix search

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NPA: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]

NXX: 690

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-690 A Ludington MI GDRQMIBODMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 348      

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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