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: DNVRCOSLDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-283 A Denver CO 9636 QWEST CORPORATION 656      
303-306 A Denver CO 9636 QWEST CORPORATION 656      
303-306 0 Denver CO 9636 QWEST CORPORATION 656      
303-306 1 Denver CO 9636 QWEST CORPORATION 656      
303-306 2 Denver CO 9636 QWEST CORPORATION 656      
303-306 3 Denver CO 9636 QWEST CORPORATION 656      
303-306 4 Denver CO 9636 QWEST CORPORATION 656      
303-306 5 Denver CO 9636 QWEST CORPORATION 656      
303-306 6 Denver CO 9636 QWEST CORPORATION 656      
303-306 7 Denver CO 9636 QWEST CORPORATION 656      
303-306 9 Denver CO 9636 QWEST CORPORATION 656      
303-337 A Denver CO 9636 QWEST CORPORATION 656      
303-338 A Denver CO 9636 QWEST CORPORATION 656      
303-368 A Denver CO 9636 QWEST CORPORATION 656      
303-369 A Denver CO 9636 QWEST CORPORATION 656      
303-614 A Denver CO 9636 QWEST CORPORATION 656      
303-636 A Denver CO 9636 QWEST CORPORATION 656      
303-671 A Denver CO 9636 QWEST CORPORATION 656      
303-695 A Denver CO 9636 QWEST CORPORATION 656      
303-696 A Denver CO 9636 QWEST CORPORATION 656      
303-743 A Denver CO 9636 QWEST CORPORATION 656      
303-745 A Denver CO 9636 QWEST CORPORATION 656      
303-750 A Denver CO 9636 QWEST CORPORATION 656      
303-751 A Denver CO 9636 QWEST CORPORATION 656      
303-752 A Denver CO 9636 QWEST CORPORATION 656      
303-755 A Denver CO 9636 QWEST CORPORATION 656      
303-873 A Denver CO 9636 QWEST CORPORATION 656      
720-744 A Denver CO 9636 QWEST CORPORATION 656      
720-744 1 Denver CO 9636 QWEST CORPORATION 656   2006-02-20   
720-744 5 Denver CO 9636 QWEST CORPORATION 656      
720-744 6 Denver CO 9636 QWEST CORPORATION 656      
720-744 7 Denver CO 9636 QWEST CORPORATION 656      
720-744 8 Denver CO 9636 QWEST CORPORATION 656      
720-744 9 Denver CO 9636 QWEST CORPORATION 656      
720-747 A Denver CO 9636 QWEST CORPORATION 656      
720-748 A Denver CO 9636 QWEST CORPORATION 656      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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