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.

Lennon, MI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
810-271 A   792K CHARTER IP ENABLED SERVICES, LLC 340      
810-271 0   792K CHARTER IP ENABLED SERVICES, LLC 340   2019-10-01   
810-271 2   145J TERRA NOVA TELECOM INC. 340   2025-07-10   
810-621 A LNONMIXIDS1  0708 LENNON TEL. CO. 340      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.