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: 331 [Rate centres in NPA 331] [Dial plan for NPA 331]

NXX: 303

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-303 A Elburn IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
331-303 0 Elburn IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-03-14   
331-303 1 Elburn IL   145J TERRA NOVA TELECOM INC. 358   2022-07-04   
331-303 2 Elburn IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-03-14   
331-303 3 Elburn IL CHCGIL24DS6  224C ONVOY, LLC 358   2014-09-15   
331-303 4 Elburn IL CHCGIL24DS6  224C ONVOY, LLC 358   2014-09-15   
331-303 5 Elburn IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-05-16   
331-303 6 Elburn IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-05-16   
331-303 7 Elburn IL CHCGILDT8MD  508J CENTURYLINK COMMUNICATIONS, LLC 358   2014-07-15   
331-303 8 Elburn IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-05-16   
331-303 9 Elburn IL CHCGILWUJMD  073H TELNYX LLC 358   2018-06-28   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.