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: 203

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
447-203 A Roberts IL CHMPILLWZMD  073H TELNYX LLC 370   2021-05-24   
447-203 0 Roberts IL CHMPILLWZMD  073H TELNYX LLC 370   2021-05-24   
447-203 2 Roberts IL CHMPILCPOMD  224C ONVOY, LLC 370   2021-05-25   
447-203 3 Roberts IL CHMPILCPOMD  224C ONVOY, LLC 370   2021-06-07   
447-203 5 Roberts IL CHMPILCPOMD  224C ONVOY, LLC 370   2021-07-04   

Last updated: Tue, 15 Nov 2022 00:10:00 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.