Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Federal Dam, MN

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
218-654 A FDDMMNXFRS6  1410 JOHNSON TEL. CO. 636      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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