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: 447 [Rate centres in NPA 447] [Dial plan for NPA 447]

NXX: 266

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
447-266 A Sadorus IL CHMPILCPOMD  224C ONVOY, LLC 370      
447-266 0 Sadorus IL CHMPILCPX5Y  624H ONVOY SPECTRUM, LLC 370   2024-05-18   
447-266 2 Sadorus IL CHMPILCPOMD  224C ONVOY, LLC 370   2023-11-04   
447-266 6 Sadorus IL   145J TERRA NOVA TELECOM INC. 370   2025-05-27   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.