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: 444

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
274-444 A Lake Mills WI   225C ONVOY, LLC - WI 356   2025-10-18   
274-444 4 Lake Mills WI   225C ONVOY, LLC - WI 356   2025-10-18   
274-444 5 Lake Mills WI   225C ONVOY, LLC - WI 356   2025-10-18   

Last updated: Mon, 15 Sep 2025 02:24:40 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.