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: DNVRCOSEDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-300 A Denver CO 9636 QWEST CORPORATION 656      
303-504 A Denver CO 9636 QWEST CORPORATION 656      
303-512 A Denver CO 9636 QWEST CORPORATION 656      
303-512 0 Denver CO 9636 QWEST CORPORATION 656      
303-512 1 Denver CO 9636 QWEST CORPORATION 656      
303-512 2 Denver CO 9636 QWEST CORPORATION 656      
303-512 4 Denver CO 9636 QWEST CORPORATION 656      
303-512 5 Denver CO 9636 QWEST CORPORATION 656      
303-512 6 Denver CO 9636 QWEST CORPORATION 656      
303-512 7 Denver CO 9636 QWEST CORPORATION 656      
303-512 8 Denver CO 9636 QWEST CORPORATION 656      
303-512 9 Denver CO 9636 QWEST CORPORATION 656      
303-584 A Denver CO 9636 QWEST CORPORATION 656      
303-639 A Denver CO 9636 QWEST CORPORATION 656      
303-691 A Denver CO 9636 QWEST CORPORATION 656      
303-692 A Denver CO 9636 QWEST CORPORATION 656      
303-753 A Denver CO 9636 QWEST CORPORATION 656      
303-756 A Denver CO 9636 QWEST CORPORATION 656      
303-757 A Denver CO 9636 QWEST CORPORATION 656      
303-758 A Denver CO 9636 QWEST CORPORATION 656      
303-759 A Denver CO 9636 QWEST CORPORATION 656      
303-782 A Denver CO 9636 QWEST CORPORATION 656      
720-242 A Denver CO 9636 QWEST CORPORATION 656      
720-242 3 Denver CO 9636 QWEST CORPORATION 656   2008-12-15   
720-242 4 Denver CO 9636 QWEST CORPORATION 656   2008-12-15   
720-524 A Denver CO 9636 QWEST CORPORATION 656      
720-524 0 Denver CO 9636 QWEST CORPORATION 656      
720-524 1 Denver CO 9636 QWEST CORPORATION 656      
720-524 2 Denver CO 9636 QWEST CORPORATION 656      
720-524 5 Denver CO 9636 QWEST CORPORATION 656      
720-524 9 Denver CO 9636 QWEST CORPORATION 656      

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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