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.

Dublin, MI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
231-415 A   792K CHARTER IP ENABLED SERVICES, LLC 348      
231-415 1   792K CHARTER IP ENABLED SERVICES, LLC 348   2023-04-23   
231-859 A KLVAMIXIDS0  0703 KALEVA TEL. CO. 348      

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.