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: DNVTCOUZ0MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-532 A Longmont CO 829J PAETEC ITEL, LLC 656      
720-213 A Denver CO 829J PAETEC ITEL, LLC 656      
720-214 A Denver CO 829J PAETEC ITEL, LLC 656      
720-274 A Denver CO 829J PAETEC ITEL, LLC 656      
720-409 A Denver CO 829J PAETEC ITEL, LLC 656      
720-454 A Denver CO 829J PAETEC ITEL, LLC 656      
720-550 A Denver CO 829J PAETEC ITEL, LLC 656      
720-617 A Denver CO 829J PAETEC ITEL, LLC 656      
720-625 A Denver CO 829J PAETEC ITEL, LLC 656      
720-644 A Denver CO 829J PAETEC ITEL, LLC 656      
720-709 A Denver CO 829J PAETEC ITEL, LLC 656      
970-475 A Greeley CO 829J PAETEC ITEL, LLC 656      
970-530 A Fort Collins CO 829J PAETEC ITEL, LLC 656      
970-578 A Johnstown-Milliken CO 829J PAETEC ITEL, LLC 656      
970-612 A Loveland CO 829J PAETEC ITEL, LLC 656      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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