Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 414 [Rate centres in NPA 414] [Dial plan for NPA 414]

NXX: 523

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
414-523 A Milwaukee Zone 1 WI   225C ONVOY, LLC - WI 356   2026-10-11   
414-523 0 Milwaukee Zone 1 WI   225C ONVOY, LLC - WI 356   2026-10-11   

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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