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: 787

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-787 A Denver CO   5562 METROPCS, INC. 656      
720-787 2 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2017-01-02   
720-787 3 Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2016-11-03   
720-787 4 Denver CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656   2017-01-02   
720-787 5 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2017-01-02   
720-787 7 Denver CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656   2016-12-02   
720-787 8 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2017-01-02   
720-787 9 Denver CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656   2017-01-02   

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.