Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 720 [Rate centres in NPA 720] [Dial plan for NPA 720]

NXX: 379

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-379 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-379 0 Denver CO   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-07-18   
720-379 1 Denver CO   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-379 2 Denver CO   026D ONVOY, LLC - CO 656   2021-08-25   
720-379 3 Denver CO   318J COMCAST IP PHONE, LLC 656   2006-12-29   
720-379 4 Denver CO   318J COMCAST IP PHONE, LLC 656   2006-12-29   
720-379 5 Denver CO   318J COMCAST IP PHONE, LLC 656   2006-12-29   
720-379 6 Denver CO   318J COMCAST IP PHONE, LLC 656   2006-12-29   
720-379 7 Denver CO   318J COMCAST IP PHONE, LLC 656   2006-12-29   
720-379 8 Denver CO   318J COMCAST IP PHONE, LLC 656   2006-12-29   
720-379 9 Denver CO   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      

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

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