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.

Switch: DNVTCOZICMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
720-813 A Denver CO 515J IP HORIZON LLC 656      
720-816 8 Allens Park-Lyons CO 515J IP HORIZON LLC 656   2024-07-12   
720-918 4 Keenesburg CO 515J IP HORIZON LLC 656   2024-07-11   
720-952 6 Deckers CO 515J IP HORIZON LLC 656   2024-07-12   
970-456 0 Glenwood Springs CO 515J IP HORIZON LLC 656   2024-07-12   
970-598 6 Platteville CO 515J IP HORIZON LLC 656   2024-08-08   
970-605 8 Weldona CO 515J IP HORIZON LLC 656   2024-07-14   
970-607 8 Ouray CO 515J IP HORIZON LLC 656   2024-07-12   
970-636 4 Yampa CO 515J IP HORIZON LLC 656   2024-08-08   
970-647 1 Julesburg CO 515J IP HORIZON LLC 656   2024-07-12   
970-659 3 Hillrose CO 515J IP HORIZON LLC 656   2024-07-12   
970-696 2 Ridgway CO 515J IP HORIZON LLC 656   2024-08-08   
970-709 8 Grand Lake CO 515J IP HORIZON LLC 656   2024-07-12   
970-772 8 Gilcrest CO 515J IP HORIZON LLC 656   2024-07-12   
970-807 1 Aspen CO 515J IP HORIZON LLC 656   2024-07-12   
970-830 0 Parachute CO 515J IP HORIZON LLC 656   2024-07-12   
970-866 5 La Salle CO 515J IP HORIZON LLC 656   2024-07-12   
970-868 0 Hot Sulphur Springs CO 515J IP HORIZON LLC 656   2024-07-12   
970-890 9 Oak Creek CO 515J IP HORIZON LLC 656   2024-07-12   
970-894 1 Berthoud CO 515J IP HORIZON LLC 656   2024-07-12   
970-919 5 Silverton CO 515J IP HORIZON LLC 656   2024-08-08   
970-955 1 Mancos CO 515J IP HORIZON LLC 656   2024-07-12   
970-997 2 Kremmling CO 515J IP HORIZON LLC 656   2024-07-12   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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