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: DNVRCOMDDS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-353 3 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2001-07-14   
303-353 5 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2002-02-04   
303-353 7 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2002-02-04   
720-258 A Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-258 0 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-258 1 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-258 2 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-258 7 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-258 9 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-286 A Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      

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

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