Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 353 [Rate centres in NPA 353] [Dial plan for NPA 353]

NXX: 200

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
353-200 A Madison WI   225C ONVOY, LLC - WI 354   2025-11-24   
353-200 0 Madison WI   225C ONVOY, LLC - WI 354   2025-11-24   
353-200 8 Madison WI   225C ONVOY, LLC - WI 354   2025-11-25   
353-200 9 Madison WI   225C ONVOY, LLC - WI 354   2025-11-25   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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