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: 715 [Rate centres in NPA 715] [Dial plan for NPA 715]

NXX: 728

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
715-728 A Eau Claire WI EUCLWIAUBMD  478J NUSO, LLC 352      
715-728 1 Eau Claire WI EUCLWIAUBMD  478J NUSO, LLC 352   2024-09-13   
715-728 2 Eau Claire WI EUCLWIAUBMD  478J NUSO, LLC 352   2022-02-04   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.