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.

OCN: 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO

<< 1 2

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
720-979 0 Denver CO AURSCOFWDS0  656      
720-990 A Denver CO AURSCOFWDS0  656      
720-990 2 Denver CO AURSCOFWDS0  656      
970-286 6 Fort Collins CO AURSCOFWDS0  656      
970-573 3 Greeley CO AURSCOFWDS0  656      
970-601 2 Mead CO AURSCOFWDS0  656      
970-800 5 Loveland CO AURSCOFWDS0  656      

<< 1 2

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.