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: DNVRCOCWDS0

Remotes:

Switch Switch name Switch type
ERIECOMARS1  ERIE  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-269 2 Denver CO 9636 QWEST CORPORATION 656      
303-335 4 Denver CO 9636 QWEST CORPORATION 656      
303-604 A Denver CO 9636 QWEST CORPORATION 656      
303-661 A Denver CO 9636 QWEST CORPORATION 656      
303-661 0 Denver CO 9636 QWEST CORPORATION 656      
303-661 1 Denver CO 9636 QWEST CORPORATION 656      
303-661 2 Denver CO 9636 QWEST CORPORATION 656      
303-661 3 Denver CO 9636 QWEST CORPORATION 656      
303-661 4 Denver CO 9636 QWEST CORPORATION 656      
303-661 5 Denver CO 9636 QWEST CORPORATION 656      
303-661 6 Denver CO 9636 QWEST CORPORATION 656      
303-661 9 Denver CO 9636 QWEST CORPORATION 656      
303-664 A Denver CO 9636 QWEST CORPORATION 656      
303-665 A Denver CO 9636 QWEST CORPORATION 656      
303-666 A Denver CO 9636 QWEST CORPORATION 656      
303-673 A Denver CO 9636 QWEST CORPORATION 656      
303-926 A Denver CO 9636 QWEST CORPORATION 656      
720-536 6 Denver CO 9636 QWEST CORPORATION 656      
720-536 7 Denver CO 9636 QWEST CORPORATION 656      
720-890 A Denver CO 9636 QWEST CORPORATION 656      

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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