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.

Chester, MI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
989-353 A OWTPMI020MD  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 344      
989-353 0 OWTPMI020MD  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 344   2020-09-03   
989-353 3   145J TERRA NOVA TELECOM INC. 344   2025-05-28   
989-939 A CTPOMIXJDS1  785G MICHIGAN CENTRAL BROADBAND COMPANY, LLC 344      

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.