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.

NPA: 720 [Rate centres in NPA 720] [Dial plan for NPA 720]

NXX: 905

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-905 A Denver CO DNVRCO26X1Y  598J FIVE9, INC. 656      
720-905 0 Denver CO DNVRCO26X1Y  598J FIVE9, INC. 656   2022-03-28   
720-905 1 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2022-04-26   
720-905 2 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2022-05-07   
720-905 3 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2022-05-07   
720-905 4 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2022-05-07   
720-905 5 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2022-04-15   
720-905 6 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-19   
720-905 7 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2022-04-26   
720-905 8 Denver CO FTCLCOMAAMD  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2022-04-05   
720-905 9 Denver CO FTCLCOMAAMD  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2022-04-05   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.