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: 225

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-225 A Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-225 0 Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-225 1 Denver CO AURSCOFWRS0  4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-225 2 Denver CO AURSCOFWRS0  4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-225 3 Denver CO AURSCOFWRS0  4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-225 4 Denver CO AURSCOFWRS0  4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-225 5 Denver CO AURSCOFWRS0  4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-225 6 Denver CO AURSCOFWRS0  4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-225 7 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-225 8 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-225 9 Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.