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

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
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      

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

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