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: DNVRCOCLDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-269 5 Denver CO 9636 QWEST CORPORATION 656      
303-269 6 Denver CO 9636 QWEST CORPORATION 656      
303-269 7 Denver CO 9636 QWEST CORPORATION 656      
303-904 A Denver CO 9636 QWEST CORPORATION 656      
303-932 A Denver CO 9636 QWEST CORPORATION 656      
303-933 A Denver CO 9636 QWEST CORPORATION 656      
303-948 A Denver CO 9636 QWEST CORPORATION 656      
303-971 A Denver CO 9636 QWEST CORPORATION 656      
303-972 A Denver CO 9636 QWEST CORPORATION 656      
303-973 A Denver CO 9636 QWEST CORPORATION 656      
303-977 A Denver CO 9636 QWEST CORPORATION 656      
303-978 A Denver CO 9636 QWEST CORPORATION 656      
303-979 A Denver CO 9636 QWEST CORPORATION 656      
720-563 2 Denver CO 9636 QWEST CORPORATION 656      
720-563 3 Denver CO 9636 QWEST CORPORATION 656      
720-563 4 Denver CO 9636 QWEST CORPORATION 656      
720-563 5 Denver CO 9636 QWEST CORPORATION 656      
720-563 6 Denver CO 9636 QWEST CORPORATION 656      
720-842 6 Denver CO 9636 QWEST CORPORATION 656      
720-842 8 Denver CO 9636 QWEST CORPORATION 656      
720-922 A Denver CO 9636 QWEST CORPORATION 656      
720-981 A Denver CO 9636 QWEST CORPORATION 656      

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

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