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: 735

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-735 A Keenesburg CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-735 0 Keenesburg CO   026D ONVOY, LLC - CO 656   2014-12-29   
720-735 1 Keenesburg CO   026D ONVOY, LLC - CO 656   2014-12-29   
720-735 2 Keenesburg CO   026D ONVOY, LLC - CO 656   2016-03-21   
720-735 3 Keenesburg CO   026D ONVOY, LLC - CO 656   2016-03-21   
720-735 4 Keenesburg CO   026D ONVOY, LLC - CO 656   2016-03-24   
720-735 5 Keenesburg CO   026D ONVOY, LLC - CO 656   2016-03-24   
720-735 6 Keenesburg CO   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2016-07-11   
720-735 7 Keenesburg CO   078F BANDWIDTH.COM CLEC, LLC - CO 656   2017-02-05   
720-735 8 Keenesburg CO   073H TELNYX LLC 656   2017-03-23   
720-735 9 Keenesburg CO   078F BANDWIDTH.COM CLEC, LLC - CO 656   2017-07-31   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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