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: DNVRCO26XUX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
970-525 A Paonia CO 516J TON80 COMMUNICATIONS, LLC 656      
970-543 A Mesa CO 516J TON80 COMMUNICATIONS, LLC 656      
970-727 A Crested Butte CO 516J TON80 COMMUNICATIONS, LLC 656      
970-733 A Dolores CO 516J TON80 COMMUNICATIONS, LLC 656      
970-738 A Norwood CO 516J TON80 COMMUNICATIONS, LLC 656      
970-809 A Red Feather Lakes CO 516J TON80 COMMUNICATIONS, LLC 656      
970-837 A Fort Collins CO 516J TON80 COMMUNICATIONS, LLC 656      
970-868 A Hot Sulphur Springs CO 516J TON80 COMMUNICATIONS, LLC 656      
970-877 A Lake City CO 516J TON80 COMMUNICATIONS, LLC 656      
970-932 A Estes Park CO 516J TON80 COMMUNICATIONS, LLC 656      
970-935 A Breckenridge CO 516J TON80 COMMUNICATIONS, LLC 656      
970-937 A De Beque CO 516J TON80 COMMUNICATIONS, LLC 656      
970-955 A Mancos CO 516J TON80 COMMUNICATIONS, LLC 656      
970-969 A Pagosa Springs CO 516J TON80 COMMUNICATIONS, LLC 656      
970-979 A Edwards CO 516J TON80 COMMUNICATIONS, LLC 656      
970-992 A Dove Creek CO 516J TON80 COMMUNICATIONS, LLC 656      
970-993 A Marvel CO 516J TON80 COMMUNICATIONS, LLC 656      
970-994 A Olathe CO 516J TON80 COMMUNICATIONS, LLC 656      
970-995 A New Castle CO 516J TON80 COMMUNICATIONS, LLC 656      
970-996 A Hayden CO 516J TON80 COMMUNICATIONS, LLC 656      
970-997 A Kremmling CO 516J TON80 COMMUNICATIONS, LLC 656      
970-998 A McCoy CO 516J TON80 COMMUNICATIONS, LLC 656      

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

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