Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 274 [Rate centres in NPA 274] [Dial plan for NPA 274]

NXX: 274

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
274-274 A Manitowoc WI MILWWI12XTX  624H ONVOY SPECTRUM, LLC 356   2024-12-14   
274-274 0 Manitowoc WI MILXWIJIGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 356   2024-12-15   
274-274 1 Manitowoc WI   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 356   2025-03-03   
274-274 2 Manitowoc WI MILWWI12XTX  624H ONVOY SPECTRUM, LLC 356   2024-12-14   
274-274 8 Manitowoc WI   225C ONVOY, LLC - WI 356   2025-04-12   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.