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.
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Switch: DNVRCO03DS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-815 A Denver CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656      
303-815 1 Denver CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2004-05-06   
303-872 2 Denver CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2005-01-13   
303-945 2 Denver CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2006-12-08   
720-420 3 Denver CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2010-07-29   
720-420 4 Denver CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2010-07-29   
720-420 5 Denver CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2010-07-29   
970-230 8 Glenwood Springs CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2014-08-07   
970-294 0 Fort Collins CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2014-08-07   
970-431 1 Gypsum CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2017-04-09   
970-432 5 Eagle CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2017-04-09   
970-445 9 Vail CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2014-08-07   
970-452 5 Aspen CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2017-04-04   
970-678 A Basalt CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656      
970-678 5 Basalt CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2017-05-08   
970-855 5 Edwards CO 5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656   2017-04-09   

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

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