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: 312

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
447-312 A Mattoon IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 976   2025-06-29   
447-312 7 Mattoon IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 976   2025-06-29   
447-312 8 Mattoon IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 976   2025-06-29   
447-312 9 Mattoon IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 976   2025-06-29   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.