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: DNVRCOCHDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-318 A Denver CO 9636 QWEST CORPORATION 656      
303-764 A Denver CO 9636 QWEST CORPORATION 656      
303-812 A Denver CO 9636 QWEST CORPORATION 656      
303-813 A Denver CO 9636 QWEST CORPORATION 656      
303-830 A Denver CO 9636 QWEST CORPORATION 656      
303-830 0 Denver CO 9636 QWEST CORPORATION 656      
303-830 1 Denver CO 9636 QWEST CORPORATION 656      
303-830 2 Denver CO 9636 QWEST CORPORATION 656      
303-830 3 Denver CO 9636 QWEST CORPORATION 656      
303-830 5 Denver CO 9636 QWEST CORPORATION 656      
303-830 6 Denver CO 9636 QWEST CORPORATION 656      
303-830 7 Denver CO 9636 QWEST CORPORATION 656      
303-830 8 Denver CO 9636 QWEST CORPORATION 656      
303-830 9 Denver CO 9636 QWEST CORPORATION 656      
303-831 A Denver CO 9636 QWEST CORPORATION 656      
303-832 A Denver CO 9636 QWEST CORPORATION 656      
303-837 A Denver CO 9636 QWEST CORPORATION 656      
303-839 A Denver CO 9636 QWEST CORPORATION 656      
303-860 A Denver CO 9636 QWEST CORPORATION 656      
303-861 A Denver CO 9636 QWEST CORPORATION 656      
303-863 A Denver CO 9636 QWEST CORPORATION 656      
303-864 A Denver CO 9636 QWEST CORPORATION 656      
303-866 A Denver CO 9636 QWEST CORPORATION 656      
303-869 A Denver CO 9636 QWEST CORPORATION 656      
303-894 A Denver CO 9636 QWEST CORPORATION 656      
720-423 A Denver CO 9636 QWEST CORPORATION 656      
720-423 0 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-423 1 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-423 2 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-423 3 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-423 4 Denver CO 9636 QWEST CORPORATION 656   2004-07-15   
720-423 5 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-423 6 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-423 7 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-423 8 Denver CO 9636 QWEST CORPORATION 656   2004-07-15   
720-423 9 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-424 A Denver CO 9636 QWEST CORPORATION 656      
720-424 0 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-424 1 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-424 2 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-424 3 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-424 4 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-424 5 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-424 6 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-424 7 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-424 8 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-424 9 Denver CO 9636 QWEST CORPORATION 656   2004-06-15   
720-426 A Denver CO 9636 QWEST CORPORATION 656      
720-508 6 Denver CO 9636 QWEST CORPORATION 656   2012-09-22   
720-917 A Denver CO 9636 QWEST CORPORATION 656      
720-917 0 Denver CO 9636 QWEST CORPORATION 656      
720-917 1 Denver CO 9636 QWEST CORPORATION 656      
720-917 2 Denver CO 9636 QWEST CORPORATION 656      
720-917 3 Denver CO 9636 QWEST CORPORATION 656      
720-917 7 Denver CO 9636 QWEST CORPORATION 656      
720-947 A Denver CO 9636 QWEST CORPORATION 656      
720-947 0 Denver CO 9636 QWEST CORPORATION 656      
720-947 1 Denver CO 9636 QWEST CORPORATION 656      
720-947 2 Denver CO 9636 QWEST CORPORATION 656      
720-947 3 Denver CO 9636 QWEST CORPORATION 656      
720-947 4 Denver CO 9636 QWEST CORPORATION 656      
720-947 5 Denver CO 9636 QWEST CORPORATION 656      
720-947 6 Denver CO 9636 QWEST CORPORATION 656      
720-947 7 Denver CO 9636 QWEST CORPORATION 656      
720-947 8 Denver CO 9636 QWEST CORPORATION 656      

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

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