Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 274 [Rate centres in NPA 274] [Dial plan for NPA 274]

NXX: 204

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
274-204 A Manitowoc WI   6692 NEW CELL DBA CELLCOM 356   2025-03-14   
274-204 0 Manitowoc WI   6692 NEW CELL DBA CELLCOM 356   2025-03-14   
274-204 1 Manitowoc WI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 356   2025-09-28   
274-204 8 Manitowoc WI   225C ONVOY, LLC - WI 356   2025-10-26   
274-204 9 Manitowoc WI   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356   2026-06-24   

Last updated: Sat, 04 Jul 2026 13:07:56 UTC

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