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: 224 [Rate centres in NPA 224] [Dial plan for NPA 224]

NXX: 837

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
224-837 A Winnetka IL CHCGILWUTMD  516J TON80 COMMUNICATIONS, LLC 358      
224-837 0 Winnetka IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2024-04-11   
224-837 4 Winnetka IL CHCGILWUTMD  516J TON80 COMMUNICATIONS, LLC 358   2022-04-25   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.