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: 719 [Rate centres in NPA 719] [Dial plan for NPA 719]

NXX: 657

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
719-657 A Del Norte CO DLNRCOMARS1  9636 QWEST CORPORATION 658      
719-657 0 Del Norte CO   9636 QWEST CORPORATION 658      
719-657 1 Del Norte CO   078F BANDWIDTH.COM CLEC, LLC - CO 658   2014-12-07   
719-657 2 Del Norte CO   9636 QWEST CORPORATION 658      
719-657 3 Del Norte CO   9636 QWEST CORPORATION 658      
719-657 4 Del Norte CO   9636 QWEST CORPORATION 658      
719-657 5 Del Norte CO   026D ONVOY, LLC - CO 658   2016-04-07   
719-657 6 Del Norte CO   026D ONVOY, LLC - CO 658   2016-04-07   
719-657 7 Del Norte CO   078F BANDWIDTH.COM CLEC, LLC - CO 658   2017-11-05   
719-657 8 Del Norte CO   508J CENTURYLINK COMMUNICATIONS, LLC 658   2014-05-22   
719-657 9 Del Norte CO   9636 QWEST CORPORATION 658      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.