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: DNVRCOMA53Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
720-263 8 Denver CO 732J NUSO, LLC 656   2024-12-04   
720-303 6 Denver CO 732J NUSO, LLC 656   2024-08-02   
720-303 7 Denver CO 732J NUSO, LLC 656   2024-08-02   
720-346 9 Denver CO 732J NUSO, LLC 656   2024-12-04   
720-719 4 Denver CO 732J NUSO, LLC 656   2024-08-02   
720-801 7 Georgetown CO 732J NUSO, LLC 656   2024-10-17   
720-801 8 Georgetown CO 732J NUSO, LLC 656   2024-10-17   
720-863 9 Denver CO 732J NUSO, LLC 656   2024-12-04   
720-978 A Denver CO 732J NUSO, LLC 656      
720-978 1 Denver CO 732J NUSO, LLC 656   2023-01-06   
970-851 7 Fort Collins CO 732J NUSO, LLC 656   2024-10-14   
970-892 2 Grand Junction CO 732J NUSO, LLC 656   2024-12-04   
970-892 7 Grand Junction CO 732J NUSO, LLC 656   2024-12-04   
983-212 9 Denver CO 732J NUSO, LLC 656   2024-12-01   
983-777 6 Denver CO 732J NUSO, LLC 656   2023-12-28   
983-999 7 Denver CO 732J NUSO, LLC 656   2024-01-30   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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